At the time of the United States' entry into World War II, the 38th Coastal Artillery Brigade was located in Fort Stewart (then known as Camp Stewart) and was deployed in the European Theater. It underwent another reorganization in September 1943, when it became Headquarters and Headquarters Battery, 38th Anti-Aircraft Brigade. The 38th Anti-Aircraft Brigade earned a battle credit and campaign streamer for participation in the Ardennes-Alsace campaign. The 38th Antiaircraft Brigade was assigned military police-like duties including guarding allied POW and displaced person camps. According to an article published in "the Coast Artillery Journal" the 38th AAA arrived in July at Avranches, France to assemble Army antiaircraft units, defend Army headquarters and nearby supply dumps.