The VOIDRUNNER'S CODEX is LIVE! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
Fantasy AGE has a very streamlined and modern Mass combat system. I used it once in November. Went very well. The battle was over after 20 minutes. It involved about 200 warriors on one side and 100 warriors in a fort with PCs on the other side.