Fort Shafter is an army installation located in the City and County of Honolulu, Hawai‘i. It is the headquarters of the United States Army Pacific, which commands most Army forces in the Asia-Pacific region with the exception of Korea. Geographically, Fort Shafter extends up the interfluve (ridgeline) between Kalihi and Moanalua valleys, as well as onto the coastal plain at Māpunapuna. A portion of the area is also known as the Palm Circle Historic District; it is listed on the National Register of Historic Places and has been further designated as a U.S. National Historic Landmark. It is also known as Palm Circle or 100 Area.