I'm in 1857 playing as USA. I wonder how many troops do I have to prepare/use for incoming American Civil War 1861-1865 ? I have built fortress + one fortress division numbering 400 + good defensive general in Washington DC numbering around 430 (engineers, artillery, medic, signals, supply, balloon observer). And fortress +fortress division in southern*Illinois. And i have +/- 11000 money ready to used to build army. My other army unit is scattered all over US in small number from 10-70, maybe numbering around 300-500 in total. How many more troops should i add/make ?