Compass & Codex
Adventure history and adventure science — fiction stories for boys.
Compass & Codex is a serialized storytelling podcast for boys ages 8–14 and the families who read with them. Every episode is a chapter of an ongoing story: fire ant scouts, Roman legions, pirates, and more — told with real biology, real history, and real stakes.
We explore the unknown, every time.
Current series:
- Colony in Danger (fire ant adventure fiction)
- Eagle's Edge (Roman historical fiction).
New chapters every week.
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Hosted by Reed Sterling.
For fans of Watership Down, Redwall, the Warriors series, Empires of the Undergrowth, and anyone who wants adventure fiction that respects the reader.
Compass & Codex
Eagle's Edge: CH 1 | Roman Recruit Swears 25 Years to Caesar's Army | Roman History Boys 8-14
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Marcus Aemilius Corvus is sixteen years old and about to swear twenty-five years of his life to Caesar's army. Once the sacramentum passes his lips, he belongs to Rome.
In this episode, Marcus arrives at the legion camp outside Genava, joins the line of
recruits, and takes the military oath that will define the next quarter-century of his
life. He meets his contubernium — the eight men who will share his tent, his food, and his battles — and learns from the veteran Petronius exactly what kind of world he has entered.
Eagle's Edge is a serialized Roman historical fiction for boys 8–14 and families. Every detail of military life is drawn from real sources — Caesar's war commentaries, the Vindolanda tablets, archaeological evidence from legionary fortresses.
Start here.
For fans of Conn Iggulden's Emperor series, Bernard Cornwell, Simon Scarrow, Total War: Rome II, and Kings and Generals.
📖 Buy the Eagle's Edge audiobook: Coming Soon!
I am the author of serialized fiction books for kids, teens, tweens and young adults, including:
- Brickhaven: A Bricks Fan Fiction Adventure
- Colony In Danger: A Fire Ant Adventure
- Eagle's Edge: A Story of Rome, Gaul and the Making of a Soldier
- Treasure Island: A Classic Adaptation
- Iron Rails & Ruin: A Novel of Steam, Sorcery and the Lawless Montana Territory
📚 All five books -- are now available on Amazon: https://us.amazon.com/stores/Reed-Sterling/author/B0H2ZM86WQ
📖 Wanna check out all five series for yourself? Get all five Chapter 1s free: https://compass-codex.kit.com/middle-school-reader-group
Thank you for listening! This is Reed Sterling. Remember: Never stop exploring unknown worlds.
— Genava, The Roman Empire, 57 BC
SPEAKER_00Marcus Aemilius Corvus is sixteen years old. He is standing in a line of strangers outside a Roman Legion's camp. In a few minutes he will swear an oath that costs him twenty five years of his life. He already knows this, but he steps forward anyway. This is Compass and Codex. Never stop exploring unknown worlds. I'm Reed Sterling, and if you've found this, you're the kind of person who wants a story that goes beyond the pages in your books. Good, you are exactly who I wrote this for. Every story on Compass and Codex goes somewhere important, to bring you stories that matter. This is the world as it actually is or was, or maybe how we wish it would be. And it turns out that the world is actually stranger and more exciting, but more dangerous and more extraordinary than we ever thought. Today we dive into Eagle's Edge, a story of Rome, Gaul, and the making of a soldier. Start here with chapter one. Don't skip ahead. You'll want to have been there from the beginning. This book is dedicated to Josh, Gabe, Daniel, Joel, and Emily, the lights of my life. Chapter one The Oath Sacramentum Scene one Marcus stood at the edge
— Marcus Takes His Place in Line
SPEAKER_00of the field outside Jenava, his legs stiff from three days of walking. Before him the Legion's camp sprawled across the valley floor like a geometric puzzle, straight lines and perfect angles carved into the muddy spring earth, so unlike the chaotic villages he'd passed on his journey north. Hundreds of men moved with purpose through the ordered grid of streets, while others stood in formations so still they might have been carved from stone. Not for the first time Marcus wondered if he'd made a terrible mistake in coming here. The cold spring air bit through his worn tunic as he joined the line of recruits snaking toward a wooden platform at the camp's entrance. Each breath plumed white before his face. They were a motley gathering, farm boys with calloused hands, shopkeepers' sons with soft palms, a few men who carried themselves with the hard eyed wariness of those who had known violence before, all of them shuffling forward one step at a time, none meeting the other's eyes. Name? The clerk at the registration table didn't look up from his wax tablet when Marcus finally reached the front. Marcus Emilius Corvus, he said, forcing his voice not to crack. Sixteen summers old and trying desperately not to look it. The clerk made a mark in the wax. Father's occupation? Farmer he's dead. Three years gone now, taken by fever after a winter flood ruined their crops. The real reason Marcus stood here, his mother and sisters needed the soldiers' pay, the stipendium that might keep them fed until his youngest sister could marry. Previous military experience? Marcus almost laughed. None, sir. I'm not a sir. I'm an immunis, the clerk finally looked up, his eyes flat with boredom. You'll learn the difference quickly enough. Stand over there with the others. The others were thirty young men huddled near a smoking brazier, stamping their feet against the cold. Marcus joined them, taking in the camp that would become his world. The precision of it stunned him. His father's old comrades had told stories of life in the legions, but none had mentioned this. The absolute rigidity of the layout, every tent placed just so, every street straight enough to have been measured with a plum line. Which, he realized, they probably had been. A horn sounded, not the hunting horns he knew from home, but something deeper, more resonant. A cornew, he guessed, though he'd never seen one. Men responded to its call like ants to some invisible signal, changing direction, forming lines, moving with purpose that Marcus couldn't decipher. First time seeing a proper castor, eh? The voice beside him belonged to a gangly youth with a pockmarked face. My uncle served under Pompey, says you can wake up blind drunk in any legion camp in the world and still find the latrine without opening your eyes. Is that supposed to be reassuring? Marcus asked. The youth grinned. Just saying it's all the same. One castor is like another. You'll learn fast. Before Marcus could respond, a centurion approached their
— The Centurion Arrives
SPEAKER_00group. The transverse crest on his helmet marked his rank even before Marcus saw the Viti's, the vine staff, gripped in his right hand. The man's face was weathered like old leather, a scar running from his left temple to the corner of his mouth, pulling his lip into a permanent half sneer. Recruits the word wasn't shouted, yet it carried like a stone thrown into still water. Form a line, shoulder to shoulder. They scrambled to obey, Marcus finding himself between the pockmarked youth and a barrel chested man who smelled strongly of garlic. The centurion walked slowly before them, his eyes moving from face to face. You are about to take the sacramentum, the military oath. Until these words pass your lips, you may walk away. He paused, letting the silence stretch. After you belong to Rome, to the Eagles, to your brothers. And yes, to me. Is that understood? A mumbled chorus of agreement rippled through the line. I can't hear you. Yes, centurion, they shouted, Marcus's voice joining the others a half beat late. Another officer approached, this one wearing a red palludimentum cloak that marked him as a tribune at least. Behind him a soldier carried a small silver statue of an eagle mounted on a pole, not the full legion standard Marcus guessed,
— The Oath (Sacramentum)
SPEAKER_00but a representation of it for the ceremony. Raise your right hands, the tribune commanded, his voice cultured, aristocratic. Repeat after me Ego Marcus Emilius Corvus Ego Marcus Emilius Corvus. The words felt strange in Marcus's mouth formal and ancient Euro per iovum optimum maximum Euro per iovem optimum maximum I swear by Jupiter best and greatest. Atque per omnis deos immortalis Atque Per omnes deos immortalis and by all the immortal gods. Mi imperatoris Gaiuli Caesaris Mi Imperatoris Gaiuli Caesaris that I will follow the Emperor Gaius Julius Caesar. The oath continued, words of loyalty and obedience flowing from his lips. Marcus would obey his officers, follow the standards, never desert his post, fight Rome's enemies wherever ordered, and accept death if he broke this sacred bond. Each phrase settled on his shoulders like another stone added to a wall, immovable, permanent. As he spoke, the final words This oath I take freely and in sound mind, so help me, Jupiter Optimus Maximus. Marcus felt something shift inside him. He was no longer Marcus from the small farm near Mediolanum. He was Myles Marcus, a soldier of Rome, a single stone in an edifice larger than he could comprehend. The tribune nodded, satisfied. You are now legionaries of Rome. You will be assigned to your contubernium. Eight men to a tent. Eight men who will eat together, march together, fight together, possibly die together. He paused.
— Assigned to the Seventh Contubernium
SPEAKER_00These men will become more your brothers than those who share your blood. Remember that. A second clerk approached with a basket of small clay tokens. Take one. The number on it corresponds to your contubernium. Marcus's fingers closed around a rough clay disc. The numeral seven was scratched into its surface. Seventh contubernium, third centuria, second cohort, shouted a Tesserarius, reading from a wax tablet. Form up over here. Marcus moved toward the voice, clutching his token. His future had been decided by a random draw from a basket. Seven other men would shape his life from this moment forward, and he hadn't met a single one of them. As he walked through the ordered chaos of the camp, the reality of what he'd done struck him with physical force. His breath caught in his chest. For twenty five years if he survived that long, he would sleep where Rome told him to sleep, march where Rome told him to march, kill whom Rome told him to kill. The vastness of that commitment made his knees weak. Yet beneath the fear something else stirred, a strange, unexpected pride. He was part of something ancient and powerful now, something that had stood for centuries and would stand for centuries more. The word virtus floated through his mind, courage, excellence, the quality of a true Roman man. He straightened his shoulders and followed the Tesserarius deeper into the camp, toward whatever fate awaited him in the seventh Contubernium. Scene two. The Tesserarius
— Inside the Papilio Tent
SPEAKER_00led Marcus through a grid of identical leather tents, each the same dun colour as the muddy ground. Men loitered between the rows, sharpening blades, mending tunics, or simply watching the new recruits with expressions ranging from amusement to pity. The air smelled of wood smoke, sweat, and the particular tang of oiled leather that Marcus would later recognise as the scent of the legions. They stopped at a tent no different from the others, except for the numeral seven scratched onto a wooden post beside it. Seventh Contubernium, the Tesserarius said without enthusiasm. Your home for the foreseeable future. He turned and walked away without another word, already looking for the next recruit to place. Marcus stood before the papillo tent, taking in its modest dimensions. The leather structure was shaped roughly like the butterfly it was named for, supported by wooden poles at the centre and sides. It seemed impossibly small to house eight grown men and their equipment. He ducked through the low entrance, blinking as his eyes adjusted to the dimmer light. Three men already occupied the space, each claiming a section of ground with their meagre possessions. They looked up at his entrance, a broad shouldered man with a broken nose, a thin youth not much older than Marcus himself, and a weathered soldier with greying temples who continued methodically sharpening a knife. Another one, said Broken Nose, without bothering to introduce himself. Pick a spot that's not taken. Marcus nodded and moved toward an empty section near the back. The tent's floor was bare earth, covered with a layer of straw, luxury compared to what he'd expected after his father's stories. He set down his small bundle of personal possessions, a spare tunic, a wooden comb, a small knife, and a leather pouch containing three copper coins, his entire worldly wealth. He had just begun to arrange his few items when the tent flap burst open, and a stocky young man practically tumbled
— Lucius Arrives
SPEAKER_00inside, grinning as though he'd been invited to a feast rather than assigned to a military unit. Is this the seventh? They told me the seventh. I've been to three wrong tents already, can you imagine? I kept introducing myself to complete strangers. The newcomer laughed at his own confusion, dropping a bulging sack in an unclaimed spot. I'm Lucius, Lucius Flavius Scava, from Rome, the Aventine Hill, specifically. My father's a baker, best bred in the city, everyone says so. Not that I'm biased, but it's true. The words poured out of him like water from an overturned bucket. Before anyone could respond, Lucius had crossed to Marcus and extended his hand. And you are? Just arrived too, by the look of you. First day's always strange, isn't it? I've been here since morning, took the oath at dawn. Have you eaten? The puls they serve is nothing like my mother's cooking, but I suppose we'll get used to it. Where are you from? Marcus blinked at the barrage of questions. Marcus Emilius Corvus, he managed, from near Mediolanum. Mediolanum? I've never been. Is it nice? What did your family do there? Do you have brothers? Sisters? I Marcus struggled to decide which question to answer first. The others were watching this exchange with expressions ranging from amusement to irritation. My father farmed, he's dead now. I have two sisters. I'm sorry about your father, Lucius said, his face instantly shifting to genuine sympathy. My mother's brother died last year. Fever took him. It's hard. Then just as quickly his expression brightened again. But sisters, I have three, all older. Always telling me what to do, how to dress, who to talk to. Is it the same with yours? Before Marcus could answer, broken nose cut in. Gods below, do you ever stop talking? Lucius turned, unperturbed. Not often, no. My mother says I was born talking and haven't paused for breath since. You should taste her lentil stew. She puts in this spice from Egyptus, I don't know what it's called, but it makes the whole house smell like heaven. Even when we had nothing else we had her stew. I tried to make it once when she was sick, complete disaster, burned the bottom, under seasoned the rest. My sisters wouldn't let me forget it for months. Marcus watched in amazement as Lucius continued describing his mother's cooking in exquisite detail, seemingly oblivious to the incredulous stares of the others. There was something almost admirable about his complete lack of self consciousness. Marcus had always measured each word before speaking, fearful of saying the wrong thing. Lucius appeared to have no such filter. Two more men entered the tent over the next few minutes, each receiving the same enthusiastic greeting from Lucius. They found spaces for themselves, careful to leave room for the eighth man who had yet to arrive. The space grew more cramped with each addition, and Marcus found himself instinctively drawing his possessions closer, defining his small territory. The conversation, driven mostly by Lucius' endless questions and anecdotes, revealed bits and pieces about his new tent mates. The thin youth was a blacksmith's apprentice from Jenarva itself. Broken Nose had been a sailor before joining the legions. The older man with the knife had served two years already and was the only experienced soldier among them. How long until we see action, do you think? Lucius asked no one in particular. My cousin served with Pompey in the East, said his first battle was three months after taking the oath. Course that was against proper armies, not these galls we'll be facing. Have any of you seen a gall up close? They're supposed to be giants, with hair like straw and skin painted blue. Is that true? The tent flap opened once more, cutting off whatever response might have come. The temperature in the tent seemed to drop several degrees as a weathered soldier ducked inside. He wasn't tall, average height at most, but something in the economy of his movements suggested a coiled strength. His face was like old leather, creased and hardened by sun and wind. A thin white scar ran along his jaw, disappearing beneath the collar of his tunic. The chatter died instantly. Even Lucius fell silent as the newcomer surveyed the tent with eyes that missed nothing. When those eyes settled on Marcus, he felt a strange sensation, as though he were being weighed and measured for a purpose he couldn't comprehend. It wasn't hostility in that gaze, it was something worse assessment, pure, cold evaluation. Without a word, the man
— Petronius: Twelve Years Under Caesar
SPEAKER_00moved to the empty space nearest the entrance, the position that would put him first out of the tent in an emergency, first to reach weapons if needed. No one challenged this choice, though it was clearly the most desirable spot. Gaius Petronius, he said finally, his voice low and rough from years of shouting commands over battlefield noise. He offered no further information about himself. An uncomfortable silence followed, broken eventually by the older soldier with the knife. Twelve years service, he asked, gesturing to a particular knot on Petronius' belt that Marcus didn't recognize. Petronius nodded once. Started under Pompey, transferred to Caesar's command two years ago. The information hung in the air, significant in ways Marcus couldn't fully grasp. He only knew that twelve years meant Petronius had survived more campaigns than most men ever saw. Well, Lucius said finally, his irrepressible nature reasserting itself, that's all eight of us then. Contubanales has a nice ring to it, doesn't it? Like we're all part of something. Petronius looked at him without expression. We're not contubenales yet. Just eight men in a tent. You earn that word. The rebuke, though mild, silenced even Lucius temporarily. In the awkward quiet that followed, each man turned to organizing his small space. They moved around each other in the cramped tent, a dance of elbows and muttered apologies as they unpacked meagre possessions and claimed sleeping spots. Marcus found himself cataloguing details about each of his tent mates, especially Petronius. The veteran's kit was worn but meticulously maintained, every item in its proper place. He moved with the confidence of a man who had performed these same actions countless times in countless camps. Nothing wasted, nothing for show. When Petronius caught Marcus watching, he didn't look away. That same evaluating gaze returned, as though he were calculating how long Marcus would last, how much use he might be before becoming another casualty. Marcus forced himself to meet those eyes and wondered, not for the first time that day, what he had gotten himself into. Scene three.
— Marcus Can't Sleep
SPEAKER_00The leather ceiling of the papillo hung just above Marcus's face, its contours barely visible in the darkness. He'd been staring at it for what felt like hours, tracing the seams where separate pieces had been stitched together, counting the faint patches where old tears had been mended. Sleep refused to come. The ground beneath his thin bedroll might as well have been solid stone, and every time he shifted position a new rock or root seemed to rise up to greet his hip bone or shoulder blade, but the physical discomfort was nothing compared to the thoughts circling his mind like hungry wolves. The tent was a symphony of sleep sounds. Lucius snored with remarkable enthusiasm, as though determined to excel even at this unconscious activity. The rhythm of it nearly matched the distant drums still beating somewhere in the camp. Broken nose, whose actual name Marcus had already forgotten, muttered occasionally, fighting enemies in his dreams. The blacksmith's apprentice whimpered like a puppy. Petronius unnervingly made no sound at all. Even in sleep the veteran maintained his guard. Marcus turned his head slowly, careful not to rustle the straw beneath his bedroll. In the dim light filtering through the tent's seams, he could just make out the shapes of his seven tent mates packed together like fish laid out at market, eight men in a space barely adequate for five, their breath mingling in the cold night air. Eight strangers bound together by nothing but the oath they'd taken and the tent walls that contained them. Outside the camp continued its nocturnal. eternal existence. Sentries called to each other at regular intervals All's well, their voices passing the message around the perimeter like links in a chain. Somewhere in the distance, a group of soldiers sang a marching song with lyrics that would have made Marcus's mother wash his mouth with soap. The chorus floated clearly through the night Caesar's boys are marching forth. Our steel is sharp and ready. If Gauls should try to block our path our pace remains quite steady. We'll take their heads, we'll take their gold, we'll take their wives to bed, for we're the boys of the tenth, and we're better off than dead. Each verse grew more obscene than the last, but there was something almost comforting in the camaraderie of it, the shared experience of men far from home finding solace in crude humor and familiar rhythms. Comfort, however, eluded Marcus entirely. His mind replayed every moment of the day in excruciating detail, cataloguing each error and embarrassment with meticulous precision. He'd stood in the wrong spot during the oath taking, earning a sharp jab from the Tesserarius's staff. He'd fumbled with his kit when showing his identification token dropping it in the mud. He'd called the Immune's sir despite being corrected once already. He'd been the last to understand the sleeping arrangements in the tent, claiming a spot that turned out to be directly beneath a leak in the leather. Each mistake felt enormous in the darkness, magnified by fatigue and uncertainty. What had possessed him to think he could be a legionary, his father's old stories had made it sound like an adventure, glory and brotherhood and purpose. The reality was cold ground, aching muscles, and the overwhelming sense that everyone else knew things he didn't. A horse whinnied somewhere nearby followed by a soldier's low curse. Marcus shifted again, trying to find a position where some part of him didn't hurt. Impossible his shoulder blades pressed against the hard earth no matter how he arranged himself. His stomach growled, the evening's thin porridge, pulse, they called it, having done little to satisfy his hunger. Even his teeth ached from clenching his jaw against the cold. This had been a terrible mistake. The thought bloomed in his mind with absolute certainty. He wasn't meant for this life he wasn't strong enough, tough enough, prepared enough. Tomorrow would bring more mistakes, more humiliation. The day after more still And what would happen when they marched north to face actual combat he'd freeze he was certain or run, or get his tentmates killed through incompetence. He thought of his mother and sisters back near Mediolanum, the farm that was slowly failing without his father's strength to work it. His mother's face when he'd announced his intention to enlist, a mixture of pride and terror that he now understood all too well. He'd promised to send his stipendium home to them, promise to make his father proud, promise to return a man, not the uncertain boy who'd left. Promises that now seemed impossible to keep. A rat scurried along the tent's edge, its tiny claws scratching against the leather. In the darkness Marcus could just make out its shape as it paused, whiskers twitching before disappearing into a gap between the tent and the ground. Even the vermin knew their way around the camp better than he did. He turned onto his side, wincing as his hip found yet another stone. Lucius's snoring hitched, then resumed at a slightly higher pitch. The blacksmith mumbled something that sounded like mother. Outside the singing had stopped, replaced by the regular
— Roman Soldier — Nine Thousand Nights
SPEAKER_00calls of the sentries and the whisper of wind through the camp. How many nights like this stretched ahead of him? The calculation made his stomach clench with dread twenty five years of service to earn Onesta Missio honorable discharge That was nine thousand one hundred and twenty five nights, nine thousand nights of cold ground and aching limbs, nine thousand opportunities to make fatal mistakes, nine thousand reminders of his inadequacy if he survived that long. His father's friend Titus had served fifteen years before a Cilician pirate's arrow found the gap between his helmet and his shoulder. Another neighbor had returned after eight years, missing his right arm and most of his mind, raving about Mithridates's scythed chariots until fever finally took him How many men who took the oath ever lived to claim their land grants? The night seemed to press closer, the darkness more complete. Marcus's breath quickened, his chest tight with something between panic and despair he was trapped by the oath he'd sworn, by the expectation of his family, by his own foolish dreams of glory. There was no escape, not from this tent, not from this camp, not from the years of service stretching ahead like an endless road disappearing into fog. In the darkness beside him Petronius shifted in his sleep, a small movement that nonetheless commanded Marcus's attention. Even unconscious, the veteran exuded the quiet competence that came from years of survival. Had he felt this same dread on his first night? Had he lain awake counting his mistakes certain of his imminent failure? Somehow Marcus doubted it. Men like Petronius were born knowing what to do, born ready. Marcus had never felt ready for anything in his life. A sentry's call drifted through the night third watch all's well already a third of the night gone, and sleep no closer than before. Marcus stared up at the leather ceiling and tried to imagine himself a year from now, hardened and confident. The image wouldn't form. Instead all he could see was tomorrow's training, tomorrow's mistakes, tomorrow's humiliations
— Eagle's Edge CH 2 — What Comes Next
SPEAKER_00nine thousand one hundred and twenty four nights to go. Eagle's edge follows Marcus Aemilius Corvus through Caesar's legions chapter by chapter. Chapter two is next the armor has been issued the march begins before dawn. And Marcus is about to discover what ninety pounds of iron and leather feels like after twenty miles of Roman roading to Compass and Codex never stop exploring unknown worlds