"Bagration" called for the First, Second and Third Belorussian and the First Baltic Fronts to engulf Army Group Center. Bagramyan was tasked with attacking the forces in the pocket, cross the Daugava River and, along with Third Belorussian, clear the surrounding areas of Vitebsk of German forces. Although he felt the plans for the "Bagration" were sound, he worried about the possibility of a German incursion by Army Group North against his forces from the north. He appealed to his superiors once more, Zhukov and Alexander Vasilevsky, to have the First Baltic Front move westward to help eliminate the Third Panzer Army, thus splitting Army Group North in two. Zhukov and Vasilevsky accepted his argument, introducing it to Stalin in a meeting on 23 May who formally approved it in a directive on 31 May.