The Allied forces were prepared for this offensive, and an air assault on the combined German units proved devastating.[234] On 21 August, 50,000 German troops, including most of the LSSAH, were encircled by the Allies in the Falaise Pocket.[235] Remnants of the LSSAH which escaped were withdrawn to Germany for refitting.[236] Paris was liberated on 25 August, and the last of the German forces withdrew over the Seine by the end of August, ending the Normandy campaign.[237]