The area of Fort Smith National Historic Site is 303,514.23168 square meters.
Fort Larned National Historic Site was created in 1964.
Fort Scott National Historic Site was created in 1978.
Fort Davis National Historic Site was created on 1961-09-08.
Bent's Old Fort National Historic Site was created in 1960.
Fort Laramie National Historic Site was created on 1931-03-04.
Fort Raleigh National Historic Site was created on 1941-04-05.
Fort Vancouver National Historic Site was created on 1948-06-19.
Fort Union Trading Post National Historic Site was created in 1829.
The area of Fort Scott National Historic Site is 68,796.5591808 square meters.
The area of Fort Larned National Historic Site is 2,905,642.9112832 square meters.
The area of Fort Davis National Historic Site is 1,918,209.9442176002 square meters.