McChord Field is a United States Air Force base in the northwest United States, in Pierce County, Washington. South of Tacoma, McChord AFB is the home of the 62d Airlift Wing, Air Mobility Command, the airbase’s primary mission being worldwide strategic airlift.

Pierce County is a county in the U.S. state of Washington. As of the 2020 census, the population was 921,130, up from 795,225 in 2010, making it the second-most populous county in Washington, behind King County, and the 59th-most populous in the United States. The county seat and largest city is Tacoma. Formed out of Thurston County on December 22, 1852, by the legislature of Oregon Territory, it was named for U.S. President Franklin Pierce. Pierce County is in the Seattle metropolitan area.