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.
noun. The definition of military is the armed forces responsible for securing and defending a country. The Army, Navy, Marines, Air Force and Coast Guard are an example of the branches in the US military.