Seeing as how they'd assigned him as a recruit, the recruiter clearly hadn't taken his claims of experience too seriously. Sergeant looked like a hardarse. Corporal was the young, enthusiastic sort. The rest looked like the usual combination of freshfaced boys and mid-400s men tired after two centuries of the same stupid peasant drudgery. No less original a set of things existed under the sun.
So, Mor thought, since they're treating me like a stupid recruit, might as well act like one, take this stupid training as a paid holiday, and then astonish the lot when the war gets around to starting.
To wit, he'd been utterly ineffectual at the latrines, woefully inept at starting a fire, and managed to even bollocks up setting up the tent. The only thing he'd been sure to do well was keep his horse well-groomed, because it wouldn't do to have it displeased with him.
Set expectations low and then perpetually barely exceed them. If that wasn't the first rule of soldiering, it was certainly in line for second.
Now, though, the Corporal was doing the stupid 'introduce yourselves' thing, trying to be the 'big brother' sort while the Sergeant did the usual 'distant, perpetually disappointed father-figure' act. He'd considered simply staying silent, but you can't do both 'incompetent' and 'unlikable', that's a recipe for nobody being willing to save your bacon. So: participation was a necessity.
Well, can't come out with 'battle-hardened mercenary', he'd be laughed clean out of camp. 'Farmhand' wouldn't work, since even a blind man would realize he was too old and too well-armed for that. 'Hunter', perhaps, but the sergeant might frown on that as a poacher covering his behind. Something uneventful, dull, but plausible for why he was armed.
"Well, er. I used to, er, guard warehouses and the like," a statement which was technically true at various points in his career. "Merchant went, er, went out of business, which is a, er, euphemism in the business for 'got hisself killed by bandits', so I, er, needed to find new work. Passed through, er, Kalein, while looking, saw the signs, and, er, s'pose I just thought I'd do my part, is all. Better this than, er, standing out on the line, eh?"