Converted from Lockheed P-38 Lightnings to North American P-51 Mustangs in the summer of 1944 and from then until the end of the war flew many long-range escort missions heavy bombers that attacked oil refineries, industries, and other strategic objectives at Berlin, Regensburg, Merseburg, Stuttgart, Brussels, and elsewhere. The 364th received a Distinguished Unit Citation for an escort mission on 27 December 1944 when the group dispersed a large force of German fighters that attacked the bomber formation the group was escorting on a raid to Frankfurt.