The largest American overseas military base is called Camp Humphreys, located in the seaport city of Pyeongtaek, along the west coast of South Korea. Camp Humphreys is home to the most active airfield in the pacific. More than 36,000 soldiers call the base home, and more than 500 buildings are on site, with various Army units sharing the base. The biggest land area military base outside of the USA is the 233,000 acres Thule Air Force Base in Greenland.