 After the United States declared war on Germany in April 1917, the United States Army, needing transports to move its men and materiel to France, convened a select committee of shipping executives who pored over registries of American shipping to evaluate transport capabilities. The committee selected Dakotan, her sister ship Montanan, and twelve other American-flagged ships that were sufficiently fast, could carry enough fuel in their bunkers for transatlantic crossings, and, most importantly, were in port or not far at sea. After Dakotan discharged her last load of cargo, she was officially handed over to the Army on 29 May.
