Ok...playing I was as the Americans, in the 1776 Campaign, I had just about wiped out the British.... They had one large army left under Clinton in New England. I had 2 armies in the general area, one American under GW, and one French under Rochambeau. Both my armies were about 85% of the size of the British army, but due to command problems I could not group them together to attack. So I tried to send them on a coordinated attack of the Brits. The American army was 14 days away from the Brits, and the French army about 17 days away. I marked both armies with the orange aggression tab (not sure which one thats called), and sent them after the British, hoping that they'd attack at the same time. Regretfully they didn't...and both were wiped out....
Is there a way to ensure that armies will coordinate an attack? If not, wouldn't it make more sense to load them all up into one large army and command problems be damned? Thanks.