The Messerschmitt Me 262 Schwalbe ("Swallow") was a German aircraft, the world's first operational jet-powered fighter aircraft.[4] It was produced in World War II and saw action starting in 1944 as a multi-role fighter/bomber/reconnaissance/interceptor warplane for the Luftwaffe. The Me 262 claimed a total of 509 Allied kills[5] (although higher claims are sometimes made[Notes 1]) against the loss of about 100 Me 262s. Considered the most advanced German aviation design in operational use[7] and according to some Allied historians it was an aircraft that might have won air supremacy back to the Luftwaffe, it had a negligible impact on the course of the war due to its late introduction and the small numbers in service.[8] The Me 262 influenced the designs of post-war aircraft such as the North American F-86 and Boeing B-47.