It remained there until the end of World War I when it returned to the United States for demobilization at Fort Monroe, Virginia in February 1919.

[8] The 38th Antiaircraft Brigade was assigned military police-like duties including guarding allied POW and displaced person camps.

On 31 July 1981, following over 20 years of air defense coverage for the ROK, the 38th ADA Brigade's headquarters was inactivated at Osan AB.

[18] On 31 October 2018, the brigade was reactivated to provide combined, joint air and missile defense in support of the US INDOPACOM Commander and reinforce the US-Japan alliance.

The gauntlet represents the protection offered by the Brigade, the lightning bolt the swift retaliation against any hostile air attack.

Scarlet and gold are for Air Defense Artillery and the fleur-de-lis and blue are used to represent France and denote the unit's service there during World War I.

[19] Lt. Gen. Kevin T. Campbell Lt. Gen. Larry J. Dodgen Laurie York Erskine Gen. Lyman L. Lemnitzer[20] Lt. Gen. John Taylor Lewis[12]: 113