The United States intends to deploy the mobile short-range AN/TWQ-1 Avenger air defense missile system in Syria and Iraq to protect ground troops against the growing threat of drone attacks. The report said, along with its FIM-92 Stinger missile launchers, the Avenger is designed for protecting infantry against low-flying aircraft, cruise missiles, helicopters, and drones. Their vulnerability was demonstrated when Iran attacked two of them with ballistic missiles in January 2020, in a retaliation for the US assassination of Iranian General Qasem Soleimani near Baghdad International Airport.
Source:https://www.middleeastmonitor.com/20210305-us-to-deploy-a-mobile-air-defence-system-in-syria-iraq/