Arizona became a territory in 1863.
Arizona Territory existed from 24 February 1863 unil 14 February 1912 when it was admitted as the 48th US State.
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Northwest Territories came into being on the same day that Rupert's Land was transferred from Britain to Canada, and on the same day Manitoba became a province: July 15, 1870.
The N.W.T. became a territory on July 15, 1870.