Harbor Defenses of Portsmouth

Harbor Defenses of Portsmouth
Active	1900-1950[1]
Country	United States
Branch	United States Army Coast Artillery Corps
Type	Coast artillery
Role	Harbor Defense Command
Part of	First Army 1933–1941 Eastern Defense Command 1941–1945
Garrison/HQ	Fort Constitution, New Castle, NH Camp Langdon, New Castle, NH (World War II)[2]
Motto(s)	We are one[3][4]
Mascot(s)	Oozlefinch

The Harbor Defenses of Portsmouth was a United States Army Coast Artillery Corps harbor defense command.^[1] It coordinated the coast defenses of Portsmouth, New Hampshire and the nearby Portsmouth Naval Shipyard in Kittery, Maine from 1900 to 1950, both on the Piscataqua River, beginning with the Endicott program. These included both coast artillery forts and underwater minefields. The command originated circa 1900 as the Portsmouth Artillery District, was renamed Coast Defenses of Portsmouth in 1913, and again renamed Harbor Defenses of Portsmouth in 1925.^[2][5][6][7]