Nevertheless, the National Redoubt had serious military and political consequences. Once the Anglo-American armies had crossed the Rhine and advanced into Western Germany, a decision had to be made whether to advance on a narrow front towards Berlin or in a simultaneous push by all Western armies spanning from the North Sea to the Alps. America's most aggressive commander, Third Army head General George S. Patton in General Omar Bradley's centrally located Twelfth Army Group, had advocated a narrow front ever since D-Day, and did so again; likewise at this point British 21st Army Group chief Field Marshal Bernard Montgomery in the north, each lobbying to be the decisive spearhead. Cautious Allied commander in chief U.S. General Dwight Eisenhower, however, resisted both. Ultimately, this broad front strategy left the Seventh Army of General Jacob L. Devers' southern Sixth Army Group in a position at war's end to race south through Bavaria into Austria to prevent German entrenchment in any mountain redoubt and cut off alpine passes to Nazi escape.