NonCredibleDefense

Roman legions could technically be considered construction teams: legionaires cleared, dug and paved roads, cleared ground for setting camp - daily, if necessary - felled, cleaned and readied wood for fortifications, dug trenches and moats, cut, escavated, moved and laid stone to bolster already built forts and even raised stone fortifications.

on top of marching entire days if necessary, with full battle gear on, at the ready for battle