Mezue ahịrịokwu na-esonụ: N'afọ 1942, ndị agha ahụ malitere iji ụgbọ elu ndị dị ogologo na-anọchi F-2s, gụnyere Lockheed A-29 Hudson, na obere oge ụfọdụ Douglas F-3 Havocs. Ojiji nke ụgbọelu ndị a gụnyere ntinye na 1942 na 1943 iji rụọ ọrụ nkewa na South America iji kwado ọrụ zuru ụwa ọnụ nke 1st Group. N'ọnwa Jenụwarị afọ 1944, ndị agha ahụ kwagara Peterson Field, Colorado, ebe ha sonyeere isi ụlọ ọrụ 1st Group, nke kwagara ebe ahụ n'ọnwa gara aga. Na Colorado, ụgbọelu ahụ gbanwere ka ọ bụrụ Liberators, na-efe efe ma F-7 reconnaissance na B-24 ụdị bọmbụ dị arọ nke ụgbọelu ahụ. Site na June ruo September 1944, ndị agha ahụ na-efe ogologo oge n'elu agwaetiti Kuril nke Japan na North Pacific. Tinyere mwakpo Boeing B-29 Superfortress na
Yawata's Imperial Iron and Steel Works n'otu ọnwa ahụ, ndị a bụ ụfọdụ n'ime ụgbọ elu mbụ na Japan kemgbe Doolittle Raid nke Eprel 1942.