Let's say I'm playing CivIV. I immediately go total war and order all of my cities to produce various military units, mostly ground-based. I move them all onto one cell, and mobilize the cell slowly towards city after city. I'm usually technological lightyears ahead of my AI opponents anyway, so I basically send a wave of artillery and mechanized infantry against "warriors" "archers" and the like. If somehow my units run low, I negotiate peace with my enemy until I can rebuild my army, then declare war again.
In other words, I'm terrible at leading a wartime civilization.
SEND EVERYTHING. TOTAL WAR. DROP WHAT YOU'RE DOING AND MAKE TANKS OR YOU'RE A TRAITOR TO MY COUNTRY.