Fort Shafter is in Honolulu CDP,City and County of Honolulu, Hawai‘i, extending up the interfluve (ridgeline) between Kalihi and Moanalua valleys, as well as onto the coastal plain (as Shafter Flats) at M?punapuna.
Fort Shafter has been home to the senior Army headquarters in Hawaii for a century. Construction began in 1905 on the ahupua'a of Kahauiki, former Hawaiian crown lands that were ceded to the United States government after annexation. When the post opened in 1907, it was named for Major General William Rufus Shafter (1835–1906), who led the United States expedition to Cuba in 1898.Fort Shafter gradually spread out from Palm Circle. Tripler General Hospital once stood where the highway intersection is today (the hospital moved to its present location in 1948). In 1914, a regimental-sized cantonment area was constructed (near Richardson Theater). The Hawaiian Ordnance Depot was built in 1917 as a separate post (near today's post exchange). In 1921, the Hawaiian Department moved to Fort Shafter from downtown Honolulu. Finally, a new area was constructed in 1940 for Signal Corps elements.