 On the first day, 500 men were encamped in the city.Within a week, more than 12,000 recruits had signed up to fight for the Union, nearly three times as many needed to meet the state's initial quota.Governor Morton and Lew Wallace, Indiana's adjutant general, quickly established Camp Morton on the former grounds of the Indiana State Fair (along Alabama Street, north of the city) as the initial mustering ground to organize and train the state's Union volunteers.