The 99th supported Allied invasions of Sicily and Italy and provided close air support to the U.S. 5th Army during its assaults on Foggia and Anzio and for French and Polish armies in their attack on Monastery Hill near Monte Cassino. On January 27 and 28, 1944, "Luftwaffe" Fw 190 fighter-bombers raided Anzio, where the Allies had conducted amphibious landings on January 22. Attached to the 79th Fighter Group, eleven of the 99th Fighter Squadron's pilots shot down enemy fighters, including Captain Charles B. Hall, who claimed two shot down, bringing his aerial victory total to three. The eight fighter squadrons defending Anzio together, claimed 32 German aircraft shot down, while the 99th claimed the highest score among them with 13.