First jet fighter to enter operational use, the Me-262 was years ahead in terms of design and performance, however, did not have sufficient priority, arriving too late to change the course of the war. Jet engines, because of the high performance, had poor reliability, causing many casualties. The first units to use it operationally bombing were (in order of Hitler, the planes were modified to carry bombs), with poor results due to the high approach speed. Only in 1944 were used in its natural function of the interceptor, with some successes against the many allied bombers and fighters.