The division managed to hold on for nine days, until it was decided to withdraw back across the Rhine by rafts and boats. At 10:00 on the last day, the Germans launched an assault with infantry and tanks on the south-east portion of the perimeter. The assault penetrated the perimeter and threatened to cut off the division from the river. British counter-attacks, supported by artillery fire from south of the river, stopped the German assault. To prevent the Germans learning about the evacuation, the plan was kept secret until the afternoon, and some men (mainly wounded) remained behind to give covering fire through the night. By 05:00, 2,163 men had been rescued and the evacuation was ended.