First seen by Allied airmen during the late summer of 1944, it wasn't until March 1945 that German jet aircraft started to attack Allied bomber formations in earnest. On 2 March, when Eighth Air Force bombers were dispatched to attack the synthetic oil refineries at Leipzig, Messerschmitt Me 262s attacked the formation near Dresden. The next day, the largest formation of German jets ever seen, most likely from the Luftwaffe's specialist 7th Fighter Wing, Jagdgeschwader 7 Nowotny, made attacks on Eighth Air Force bomber formations over Dresden and the oil targets at Essen, shooting down a total of three bombers.