In 1927, the citizens of Pierce County, Washington approved a bond measure to establish an airfield just north of the military reservation. The airfield, named Tacoma Field, officially opened March 14, 1930. On February 28, 1938 the airfield was officially transferred to the United States Government. Three years after the transfer, on July 3, 1940, the airfield was renamed McChord Field, in honor of Colonel William Caldwell McChord, who had been killed in an accident near Richmond, Virginia on August 18, 1937. Col McChord, (1881–1937), rated as a junior military aviator in 1918, died while trying to force-land his Northrop A-17 near Maidens, Virginia. At the time of his death, he was Chief of the Training and Operations Division in HQ Army Air Corps. Over the subsequent two decades McChord Field grew to roughly 3,000 acres (12 km²), encompassing the northern tip of the 70,000 acre (280 km²) Ft. Lewis. It became independent of Ft. Lewis in 1947 following the creation of the Air Force under provisions of the National Security Act of 1947.

Naval Base Kitsap is a US Navy base located on the Kitsap Peninsula. It was created in 2004 by merging the former Naval Station Bremerton with Naval Submarine Base Bangor. The Mission of Naval Base Kitsap is to serve as the host command for the Navy’s fleet throughout West Puget Sound and to provide base operating services, including support for both surface ships and submarines homeported at Bremerton and Bangor. NB Kitsap also provides service, programs, and facilities to meet the needs of their hosted war fighting commands, tenant activities, crew, and employees. NB Kitsap is the largest naval organization in Navy Region Northwest and is composed of installations in Bremerton, Bangor and Keyport. Naval Base Kitsap was the recipient of the 2005 Commander in Chief’s Award for Installation Excellence, the Best Base in the U.S. Navy.