<P> The Channel subsequently became the stage for an intensive coastal war, featuring submarines, minesweepers, and Fast Attack Craft . </P> <P> Dieppe was the site of an ill - fated Dieppe Raid by Canadian and British armed forces . More successful was the later Operation Overlord (D - Day), a massive invasion of German - occupied France by Allied troops . Caen, Cherbourg, Carentan, Falaise and other Norman towns endured many casualties in the fight for the province, which continued until the closing of the so - called Falaise gap between Chambois and Montormel, then liberation of Le Havre . </P> <P> The Channel Islands were the only part of the British Commonwealth occupied by Germany (excepting the part of Egypt occupied by the Afrika Korps at the time of the Second Battle of El Alamein, which was a protectorate and not part of the Commonwealth). The German occupation of 1940--1945 was harsh, with some island residents being taken for slave labour on the Continent; native Jews sent to concentration camps; partisan resistance and retribution; accusations of collaboration; and slave labour (primarily Russians and eastern Europeans) being brought to the islands to build fortifications . The Royal Navy blockaded the islands from time to time, particularly following the liberation of mainland Normandy in 1944 . Intense negotiations resulted in some Red Cross humanitarian aid, but there was considerable hunger and privation during the occupation, particularly in the final months, when the population was close to starvation . The German troops on the islands surrendered on 9 May 1945, a day after the final surrender in mainland Europe . </P> <P> The English Channel coast is far more densely populated on the English shore . The most significant towns and cities along both the English and French sides of the Channel (each with more than 20,000 inhabitants, ranked in descending order; populations are the urban area populations from the 1999 French census, 2001 UK census, and 2001 Jersey census) are as follows: </P>

Where does the north sea became the english channel