Named for Revolutionary War general and South Carolina native Thomas Sumter, Fort Sumter was one of nearly 50 forts built as part of the so-called Third System, a coastal defense program implemented by Congress in 1817.
In simple terms, the U.S. Armed Forces are made up of the five armed service branches: Air Force, Army, Coast Guard, Marine Corps, and Navy.
The remaining elements of the Department of the Army that provide broad command, control, communications,and intelligence (C 3 |) functions are seven specific major Army commands (MACOMs) headquartered in thecontinental United States (CONUS) presented on pages 25-33.e.