Duke Energy is seeking state permission to build a solar farm and a power-storage system at the Indiana National Guard's Camp Atterbury training base.
The training is expected to last through Aug. 20 and will include additional gunfire and explosions.
The Army spent billions of dollars getting the National Guard ready for the wars in Iraq and Afghanistan, but now there are questions about the Guard's mission.
Camp Atterbury completed barracks and a dining facility as well as a railhead and deployment center.
Camp Atterbury is laying off civilian contractors who worked on a program that prepared soldiers for deployment.
About 5,000 military and civilian personnel are starting a two-week disaster training exercise today.
More than 200 employees at Camp Atterbury in Edinburgh will lose their jobs.
The training helps prepare U.S. military, homeland security personnel and first responders to attend in the event of a large-scale emergency.
The Office of Defense Development will be located in Bloomington.
Camp Atterbury plans to break ground on its new expansion this week.