The balloon’s demonstration triumph led the Secretary of War Simon Cameron to direct Lowe to build four additional balloons. Two more followed shortly. The fleet now consisted of the Intrepid, Constitution, United States, Washington, Eagle, Excelsior, and the original Union. The balloons ranged in size from 32,000 cubic feet (906 cubic meters) down to 15,000 cubic feet (425 cubic meters). Each had enough cable to climb 5,000 feet (1524 meters).