[1] The Naval Support Base Bangor's naval history began in 1942 when it became a site for shipping ammunition to the Pacific Theater of Operations during World War II.

For an expansion and to establish a permanent naval base, the U.S. Navy purchased 7,676 acres (3100 hectares) of land on the Hood Canal near the town of Bangor, Washington for approximately $18.7 million.

Naval ammunition magazine was established on June 5, 1944, for its construction, and it began operations in January 1945.

In 1973, the Navy announced the selection of the Bangor base as the home port for the first squadron of Ohio-class Trident Fleet Ballistic Missile submarines.

Naval Base Kitsap includes the Strategic Weapons Facility Pacific (SWFPAC) which provides maintenance, calibration, missile assembly/test, spare parts, and spare nuclear warhead storage for the UGM-133 Trident II submarine-launched ballistic missiles carried by the nuclear submarines.