> Violence was one of the main ways actors resolved conflicts in this period

Violence or threat of violence are still powerful tools.

> because we know how much time they spent marching around their areas putting down revolts and fighting off invasion

Medieval war was mostly seasonal. Also, war was mostly fought against neighbors or sometimes in the holy land. as far as revolts go, post-enlightenment slave revolts were much more common than revolts in the middle ages, though they're often not well-taught in schools. In today's world, my country is involved in hot and cold conflicts all over the world. I'd claim we're more warlike now because we can be.