A brown water navy or riverine force, refers to maritime forces specific to operations within inland waterways, including rivers, lakes, and coastal areas. Today, it broadly encompasses small patrol boats and gunboats deployed in coastal areas and on rivers, supported by larger motherships. While riverine units remain an element of the modern U.S. Navy, the phrase "brown-water navy" is most associated with its significant operational role in the Vietnam War, securing the Meko

The 9th Infantry Division of the U.S. Army is nicknamed the "Old Reliables." It was created during World War I as the 9th Division, but it was never deployed overseas. The division proved to be an important asset during World War II, Vietnam, and the Cold War.