 Following the reduction of the Ruhr, the 15th Army was to take over occupation duties in the region as the 9th, 1st and 3rd Armies pushed farther into Germany.On 28 March, as these developments unfolded, Eisenhower announced his decision to adjust his plans governing the future course of the offensive.Once the Ruhr was surrounded, he wanted the 9th Army transferred from the British 21st Army Group to the U.S. 12th Army Group.