On the sixth morning of dawn drill, Abster made the mistake of sparring with Macro directly.
He'd been working up to it — or more accurately, he'd been avoiding it, watching Macro move through the exercises with the flat efficiency of someone for whom violence had always been less a skill than a natural property, like height. No excess. No performance. His shield came up exactly as far as it needed to and stopped. His blade moved in small arcs that seemed almost lazy until they weren't.
And he was left-handed. Abster had noticed this on the first morning and filed it. In a century that trained entirely for right-handed opponents, Macro had spent five years quietly compensating — shield in the right hand, blade in the left, everything mirrored. It made him slightly awkward in a locked wall and almost impossible to read in open combat. There was no muscle memory in Abster's soldier-body for what came from that angle. The drills hadn't built it.
He stepped into Macro's space on the sixth morning with his training blade up and said, "Me."
Macro looked at him briefly, then settled into stance.
The first exchange lasted four seconds. Macro's blade caught Abster's wrist, then his elbow, then would have opened his throat. Abster connected once — a glancing touch on the shoulder that would not have slowed anybody.
"Again," Abster said.
Second exchange: six seconds. Same result.
Third: seven. Same.
By the fifth he was breathing hard and Macro was not, and the rest of the contubernium had stopped what they were doing to watch. Rufus had the specific expression of a man watching someone he likes get beaten, which on Rufus meant open delight. Pilo looked genuinely distressed on Abster's behalf, which Abster noted and filed. Drusus watched with his usual measuring quiet.
Abster stepped back and lowered the blade.
"You're better than me," he said.
Macro blinked. It was — Abster could see him processing it — apparently not something anyone had said to him directly before. "In single combat," he said, after a moment.
"In single combat," Abster agreed. "Which means I've been using you wrong."
Nobody said anything. The torches guttered. Somewhere across camp the mule had begun its morning proceedings.
He didn't announce what he was doing. He just did it, over two weeks, incrementally, watching for what each adjustment produced.
The principle was simple, which didn't mean it was obvious: Rome's legions had not conquered most of the known world through individual excellence. They'd done it through systems. Training, logistics, command structure, engineering — the machinery that elevated ordinary men to collective capability that no individual could match. The late empire had let the machinery corrode. The men were still there. The raw material was present and largely wasted.
Macro became the sword instructor. His left-handed technique, once a private adaptation that nobody had ever formally acknowledged, became the thing Abster built the morning spar around. Every man in the contubernium now drilled against it — not until they could beat it, that was probably not achievable, but until it stopped being a surprise. Gothic warriors, Germanic auxiliaries, the various peoples the empire absorbed and deployed at its borders — a meaningful fraction of them fought with the blade in the left hand. The XII had been training for a right-handed world. This cost nothing to fix except attention.
Tullus he moved toward speed work. Short bursts, direction changes, the kind of mobility that could carry a message through a collapsing formation or exploit a gap before it closed. He was mediocre as a heavy infantryman and exceptional at moving fast in small spaces, and the legions of the late empire desperately needed men who were exceptional at moving fast in small spaces because the cavalry they'd once relied on to do that work was increasingly unavailable, expensive, or unreliable. Tullus didn't need to know the strategic reasoning. He just needed to be told that his natural movement was a skill worth cultivating, which nobody had previously told him.
The brothers he kept together. Their synchronicity had always been treated as a discipline problem — two men who couldn't be trusted to operate independently because they kept orienting on each other. Abster spent four mornings watching them and concluded that this framing was exactly backward. They didn't drift toward each other because they were undisciplined. They drifted toward each other because they had spent their entire lives developing an instinctive double-movement that neither of them could fully articulate and that made them extremely difficult to flank. He stopped trying to separate them and started building around what they already did.
Glabrio, on the third morning of this, paused and looked at Abster with an expression that wasn't quite suspicion.
"You're not drilling us the way Corvus drills us," he said.
"No."
"Why."
"Because you're not the same as each other." Abster looked at him. "Corvus is drilling a century. I'm drilling eight people."
Glabrio thought about this for a moment and went back to work. Abster noticed that he stood slightly differently afterward — not straighter, something harder to name. Like a man who had been told that the thing he already was had a use.
Pilo was the one that kept him up at night. Not literally — he slept badly for entirely separate reasons, mainly the cold and the ankle and the ongoing noise problem created by Rufus — but in the way a specific concern persists at the back of the mind and resurfaces at inconvenient moments.
The flinch was the problem. When a blade came fast toward his face, Pilo's shield arm dropped. Every time, consistently, regardless of how many times he'd drilled the correct response. His body had decided that the right reaction to incoming metal was to pull inward, and it was not wrong — that instinct had been installed by a few million years of evolution for good reason — but it was going to get him killed.
"You're flinching before contact," Abster told him, on the eighth morning.
"I know." The misery in it was complete.
"Your body is trying to help you. It's wrong about what helping looks like here." Abster tapped the edge of Pilo's shield. "A dropped shield gets you killed faster than whatever it was protecting you from."
"I know," Pilo said again, more quietly.
"Knowing doesn't fix it. Knowing is in your head. The flinch is in your shoulder." He held Pilo's gaze. "We're going to teach your shoulder something different. It's going to be tedious and it's going to feel pointless and then one day it won't be."
He spent twenty minutes each morning throwing slow strikes at Pilo's face — controlled, not hard enough to hurt, fast enough to trigger the response. Each time Pilo held the shield, Abster said good and meant it. Each time the arm dropped, he reset and tried again without comment. No punishment, no frustration, just the same patient repetition. He'd learned this from sports psychology reading he'd done for an entirely unrelated reason in London and had never expected to apply to a seventeen-year-old on the Danube, but knowledge turned out not to care about its original context.
By the end of the second week Pilo was holding the shield. Not every time. Most times.
Abster found this disproportionately satisfying and did not examine why too closely.
Corvus started appearing near the supply wagons at dawn.
Not watching, exactly — there was always a plausible reason for him to be where he was. Checking something. Speaking to the supply clerk. Moving through on his way to somewhere else. But he was there with increasing frequency, and Abster ran the drills without acknowledging him, and they maintained this arrangement with the mutual understanding of two people who had agreed not to have a conversation yet.
On the fourteenth morning Corvus stood at the edge of the space and watched without pretense for thirty minutes. When the men dispersed for breakfast he walked over. He had not shaved again. He looked tired in the sustained way of a man whose sleep was being interrupted by things he couldn't act on.
"The brothers," he said.
"Flank coordination. They've been doing it instinctively for years. I gave it a shape."
"I've not seen it in any training manual."
"No." Abster cleaned his training blade. "It came from watching them."
Corvus looked at the empty drill space. "And Macro running the sword work."
"He's the best in the century. Possibly the cohort. Running him as a line replacement was like using a millstone to crack walnuts."
"That's an interesting way to put it." Corvus's expression had something in it that wasn't quite amusement — more like recognition, the look of a man hearing something he's thought privately stated out loud. "Vegetius would agree with you."
Abster was careful not to react. "You've read Vegetius."
"I've read what I could find. The full text isn't compiled yet — there are sources, fragments. I've been collecting them since Adrianople." He said it flatly, the name landing without drama. It was a name Corvus used the way you use the name of a bad year. Since Adrianople the way someone else might say since the flood. "He argues for role differentiation. Training to aptitude rather than uniformity."
"That's—" Abster stopped.
Adrianople. Since Adrianople. Which meant Corvus had been at Adrianople, or near enough to it, or had lost enough people to it, that it was his fixed point. And Adrianople was two years away, not yet a name anyone on this bank had cause to say, and Corvus had just used the past tense.
Abster kept his face still. "That's what I've been working from," he said.
Corvus looked at him for a long moment — the coin-weighing look, not suspicious exactly, more like calibrating. "Optio Gallus is going to Ravenna next month," he said. "Palace guard posting. He's past frontier age." A pause. "The position will need filling."
"I understand," Abster said.
"I'm not promising anything."
"I'm not expecting anything."
Corvus held his gaze a moment longer, then turned and walked toward the century's command tent. Abster watched him go. Since Adrianople. The phrase was sitting in him like a splinter, working inward. Corvus had fragments of Vegetius. Corvus had been somewhere near the worst military defeat the empire had suffered in six hundred years, already, in this man's past — except it was two years in Abster's future, or in the future that existed if nothing changed, and Corvus had said since as though it were settled.
He didn't know what to do with that.
He stood in the thin morning light with the empty drill space around him and the Gothic tent-cities along the bank and the sounds of a camp that was not sleeping enough and not eating enough and had been here long enough to start generating its own ambient tension. His ankle had finally stopped catching. His hands knew the training blade's weight without thinking about it.
He didn't have a map for any of this. He'd thought he did. He had one for outcomes — the shape of catastrophe, the sequence of failures. He didn't have one for people, for Corvus already carrying Adrianople somewhere in him, for Pilo holding his shield, for a man handing over his sword and not being looked at.
History was made of outcomes and causes, recorded after the fact, cleaned of noise and individual confusion. He was inside the noise. He was individual confusion.
He picked up the training blade and moved through the footwork forms alone in the cold, and tried to think about the next thing, and only the next thing, because that was all there was to think about.
The next thing was breakfast. Then muster. Then whatever the day brought that he hadn't predicted yet.
There would be something. There always was.