This is a list of B-29 Superfortress units consisting of nations, their air forces, and the unit assignments that used the B-29 during World War II, Korean War, and post war periods, including variants and other historical information Delivery of the first YB-29 test aircraft (YB-29-BW 41-36954) to the USAAF was made in June 1943, being delivered to the 58th Bombardment Wing, 40th Bombardment Group. The first production B-29s began to roll off the production lines at Boeing-Wichita in September 1943, also going to the 58th BW.