Established in 1971, the museum was originally housed in a two-story barracks. In July 1973, it was moved to the old Fort Lewis Inn.
Exhibits
Inside the museum are approximately of interior displays of various collections of uniforms and equipment, including "Soldiers of the Northwest", I Corps, the 9th Infantry Division, the Medical Corps, and "The Army Family". Outside, on, in the Vehicle Park, are a collection of tanks, jeeps, and other military vehicles, along with weapons, including a Nike-Hercules Missile and an Honest John rocket. The current director is Erik Flint. The Museum was reopened in 2012 after a two-year renovation. The museum closed on July 2, 2016 and reopened on August 31, 2017 after renovations of the interior exhibits to include dioramas and interactive features.
Red Shield Inn
The Red Shield Inn is one of two surviving Fort Lewis buildings that date back to the World War I era, when the present Fort Lewis was "Camp Lewis". It is the only remaining structure from a onetime recreational area that was called Greene Park. The building, in Western Stick–style, was built in 1918 by Pratt & Watson Construction Co. of Spokane, Washington, for the Salvation Army, at a cost of $107,000. It was named the Red Shield Inn, based on the Salvation Armysymbol. It was in size and had approximately 150 rooms. The Salvation Army sold it to the U.S. Army on July 21, 1921, for the nominal price of one dollar. It was briefly known as the Camp Lewis Apartments, then the Camp Lewis Inn, and from 1927 the Fort Lewis Inn. In August 1972, after the new Fort Lewis Lodge opened near the Main Post Headquarters, the building was preserved to become the new home for the fort's museum. The inn officially became the Fort Lewis Military Museum on July 18, 1973. It gained its NRHP listing in February 1979.
Gallery
File:FLMM - Viet Cong sandals.jpg|Vietnamese sandals made from recycled tire treads File:Fort Lewis Military Museum - tanks in yard 01.jpg|Fort Lewis Military Museum File:Fort Lewis Military Museum - tanks in yard 02.jpg|Outdoor display File:Fort Lewis Museum 033.JPG|Winter uniform of Korean War U.S. Infantryman File:Fort Lewis Museum 059.JPG|Huey Helicopter in courtyard File:Fort Lewis Museum 071.JPG|U.S. M103 Heavy Tank