 Evidence of smaller barrack-blocks being built, as at Birdoswald, suggest reduced manning by the army and a sharing between the military and civilian population.Changes in the military across the empire, (such as advancement of soldiers not from the senatorial classes plus greater use of 'barbarian' skilled workers), led to a more lax discipline.Despite a more settled existence in places like Cumbria, internal strains began to affect the empire as a whole.