The Royal Navy blockaded the islands from time to time, particularly following the liberation of Normandy in 1944. Intense negotiations resulted in some Red Cross humanitarian aid, but there was considerable hunger and privation during the five years of German occupation, particularly in the final months when the Germans themselves were close to starvation. The Germans surrendered Alderney on 16 May 1945, eight days after the Allies formally accepted the unconditional surrender of the armed forces of Nazi Germany and the end of Adolf Hitler's Third Reich, and seven days after the liberation of Guernsey and Jersey. 2,332 German prisoners of war were removed from Alderney on 20 May 1945, leaving 500 Germans to undertake clearing up operations under British military supervision.