, ▁Arizona ' s ▁economy ▁began ▁to ▁shift ▁away ▁from ▁the ▁" F ive ▁Cs " ▁to ▁a ▁modern , ▁av iation - dri ven , ▁manufact uring ▁and ▁technology - based ▁economy . ▁Following ▁the ▁Japanese ▁attack ▁on ▁Pear l ▁Har bor , ▁Hawai i , ▁on ▁December ▁ 7 , ▁ 1 9 4 1 , ▁the ▁benefits ▁of ▁particip ating ▁in ▁the ▁war ▁act ively ▁added ▁to ▁the ▁already ▁recover ing ▁economy . ▁Although ▁the ▁cattle , ▁cot ton , ▁and ▁co pper ▁indust ries ▁began ▁to ▁b ust le ▁once ▁again , ▁manufact uring ▁eventually ▁took ▁over . ▁In ▁ 1 9 4 0 ▁the ▁gross ▁income ▁for ▁manufact uring ▁was ▁$ 1 7 ▁million . ▁By ▁ 1 9 4 5 ▁the ▁number ▁had ▁grown ▁to ▁$ 8 5 ▁million ▁and ▁by ▁the ▁ 1 9 6 0 s ▁manufact uring ▁had ▁become ▁the ▁state ' s ▁number ▁one ▁income - produ cing ▁industry . ▁ ▁The ▁population ▁of ▁Arizona , ▁particularly ▁in ▁Phoenix , ▁sw elled ▁as ▁result ▁of ▁the ▁war ▁and ▁it ▁was ▁the ▁new ▁military ▁install ations ▁and ▁associated ▁manufact ur ers ▁that ▁provided ▁the ▁imp et us ▁for ▁the ▁growth . ▁Many ▁veter ans ▁who ▁were ▁station ed ▁in ▁Arizona ▁during ▁the ▁war ▁returned ▁after ▁the ▁fighting ▁was ▁over , ▁having ▁found ▁it ▁to ▁be ▁a ▁good ▁place ▁to ▁find ▁work ▁and ▁raise ▁a ▁family . ▁In ▁ 1 9 4 0 , ▁the ▁population ▁of ▁Arizona ▁was ▁less ▁than ▁ 5 0 0