Osan Air Base, Republic of Korea

Osan Air Base is one of two major airfields operated by the U.S. Air Force in the Republic of Korea and the only base on the peninsula entirely planned and built by the U.S. Air Force during the Korean War. The base is located 4.7 miles southwest of the town of Osan-Ni, for which the base was named, and about 20 miles south of Seoul, the capital city of the ROK. Prior to the invasion of the ROK by the North Korean communists in 1950, the area consisted of several small farming villages near the hillsides and a large number of rice paddies along the Chin Wi River where the runway now lies.

A large ginko tree, more than 1,200 years old and a national treasure, is situated on a small hill where one of these villages was located, and still stands on the number four hole of the base golf course.

Read more on the official USAF Factsheet Osan Air Base History