▁South west ▁Air ▁District , ▁ 1 6 ▁January ▁ 1 9 4 1 ▁– ▁ 1 1 ▁March ▁ 1 9 4 1 ▁ ▁Four th ▁Air ▁Force , ▁ 3 1 ▁March ▁ 1 9 4 1 ▁– ▁ 1 7 ▁July ▁ 1 9 4 4 ▁ ▁A AF ▁M ater iel ▁and ▁Services ▁Command , ▁ 1 7 ▁July ▁ 1 9 4 4 ▁– ▁ 3 1 ▁August ▁ 1 9 4 4 ▁ ▁A AF ▁Techn ical ▁Service ▁Command , ▁ 3 1 ▁August ▁ 1 9 4 4 ▁– ▁ 6 ▁June ▁ 1 9 4 5 ▁ ▁Cont inental ▁Air ▁Forces , ▁ 6 ▁June ▁ 1 9 4 5 ▁– ▁ 1 6 ▁October ▁ 1 9 4 5 ▁ ▁Air ▁Techn ical ▁Service ▁Command , ▁ 1 6 ▁October ▁ 1 9 4 5 ▁– ▁ 9 ▁March ▁ 1 9 4 6 ▁ ▁Air ▁M ater iel ▁Command , ▁ 9 ▁March ▁ 1 9 4 6 ▁– ▁ 2 ▁April ▁ 1 9 5 1 ▁ ▁Air ▁Research ▁and ▁Development ▁Command , ▁ 2 ▁April ▁ 1 9 5 1 ▁– ▁ 1 ▁April ▁ 1 9 6 1 ▁ ▁Air ▁Force ▁Systems ▁Command , ▁ 1 ▁April ▁ 1 9 6 1 ▁– ▁ 1 ▁July ▁ 1 9 9 2 ▁ ▁Air ▁Force ▁M ater iel ▁Command , ▁ 1 ▁July ▁ 1 9 9 2 – present ▁ ▁Major ▁units ▁assigned ▁▁▁ 4 1 st ▁Bomb ard ment