The French Renault FT light tank is considered to be one of the most revolutionary and influential tank designs in history and the forerunner of modern tank design. The FT was the first tank to have a turret that rotated 360 degrees and carried its main armament in the turret. Design work began in December 1915 by Louis Renault and production began in early 1917. The FT entered combat on May 31, 1918 east of the Forest of Retz, near Chaudun, between Soissons and Villers-Cotterets during the Second Battle of the Marne. 30 FTs successfully broke up a German advance but in the absence of infantry support, the vehicles had to withdraw. As the front lines began to break up in the summer of 1918, FTs were often transported on trucks and special trailers to keep up with the advance. The FT also featured automatic track tension to prevent derailments, a rounded tail piece to assist in crossing trenches and internal ventilation provided by the engine's radiator fan which drew its air through the front crew compartment of the tank and forced it out through the rear engine's compartment. Around 3,000 Renault FT tanks were made in France and 950 were made in the United States. After WWI the FT was widely exported and used by Afghanistan, Belgium, Brazil, the Republic of China, Czechoslovakia, Estonia, Finland, France, Nazi Germany, Iran, Japan, Lithuania, the Netherlands, Philippine Commonwealth, Poland, Romania, the Russian White movement, the Soviet Union, Spain, Sweden, Switzerland, Turkey, the United Kingdom, the United States and the Kingdom of Yugoslavia. It fought in the Russian Civil War, Polish-Soviet War, Chinese Civil War, Rif War, Spanish Civil War, and Estonian War of Independence. They were also used into WWII by Poland, Finland, France, and the Kingdom of Yugoslavia. Although it was obsolescent, the French still fielded 534 FTs in 1940. Altogether the Germans captured 1,704 FTs during WWII. About 100 for airfield defense and about 650 for patrolling occupied Europe. Vichy France also used Renault FTs against the Allies during Operation Torch in Morocco and Algeria. The Renault FT was armed with either a Puteaux SA 1918 37 mm canon or a 8 mm Hotchkiss machinegun. This model shows a Renault FT of 1 Compagnie 3 Section 29 BCC 2 Armee in North France during 1940.