Additional losses in the Rhineland further weakened the German Army, leaving shattered remnants of units to defend the east bank of the Rhine. On 7 March, the Allies seized the last remaining intact bridge across the Rhine at Remagen, and had established a large bridgehead on the river's east bank. During Operation Lumberjack, Operation Plunder and Operation Undertone in March 1945, German casualties during February–March 1945 are estimated at 400,000 men, including 280,000 men captured as prisoners of war.[17]