The first US medium bomber used in the Pacific Theater in early 1942, it was also used in the Mediterranean Theater and in Western Europe. The aircraft distinguished itself as "the chief bombardment weapon on the Western Front" according to a United States Army Air Forces dispatch from 1946,[citation needed] and later variants maintained the lowest loss record of any U.S. combat aircraft during World War II. Its late-war loss record stands in sharp contrast to its unofficial nickname "The Widowmaker" earned due to early models' high rate of accidents during takeoff.