Code-named 'Operation Overlord', the D-Day landings were the largest seaborne invasion in history. Early on the morning of 6 June 1944, swarms of landing crafts - part of an armada of more than 6,000 ships and boats - hit the beaches of northern Normandy and tens of thousands of Allied soldiers began pouring onto French soil. The majority of the 135,000 Allied troops who arrived in France that day stormed ashore along 50 mile of beaches north of Bayeux, code-named (from west to east) Utah, Omaha, Gold, Juno and Sword. Strong winds blew the landing craft east of their intended positions, particularly at Utah and Omaha. The men landed under heavy fire from gun emplacements overlooking the beaches, and the shore was mined and covered with obstacles such as wooden stakes, metal tripods, and barbed wire, making the work of the beach-clearing teams difficult and dangerous. Casualties were heaviest at Omaha, with its high cliffs. At Gold, Juno, and Sword, several fortified towns were cleared in house-to-house fighting, and two major gun emplacements at Gold were disabled, using specialized tanks. The landings on D-Day - known as 'Jour J' in French - were followed by the 76-day Battle of Normandy, during which the Allies suffered 210,000 casualties, including 37,000 troops killed. German casualties are believed to have been around 200,000; another 200,000 German soldiers were taken prisoner. About 14,000 French civilians also died.