4:1st ADA

The 4th Battalion, 1st Air Defense Artillery Regiment (4-1 ADA) traces its lineage back to the original 1st Regiment of Artillery, constituted in 1821. Throughout its history, the unit has participated in major conflicts, including World War II and the Gulf War, providing critical air defense capabilities. In recent years, 4-1 ADA has been equipped with the Patriot missile system, deploying to locations such as South Korea to defend against aerial threats. The battalion continues to serve as a vital component of U.S. Army air and missile defense operations in the Indo-Pacific region.