Operation Dragoon

Operation Dragoon (initially Operation Anvil), known as Débarquement de Provence in French ("Provence Landing"), was the code name for the landing operation of the Allied invasion of Provence (Southern France) on 15 August 1944. Although initially designed to be executed in conjunction with Operation Overlord, the June 1944 Allied landing in Normandy, the lack of enough resources led to the cancellation of the second landing. By July 1944 the landing was reconsidered, as the clogged-up ports in Normandy did not have the capacity to adequately supply the Allied forces. Concurrently, the high command of the French Liberation Army pushed for a revival of the operation, which would involve large numbers of French troops. As a result, the operation was finally approved in July to be executed in August.

The invasion sought to secure the vital ports on the French Mediterranean coast and increase pressure on the German forces by opening another front. After preliminary commando operations, the US VI Corps landed on the beaches of the Côte d'Azur under the protection of a large naval task force, followed by several divisions of French Army B. They were opposed by the scattered forces of the German Army Group G, which had been weakened by the relocation of its divisions to other fronts and the replacement of its soldiers with third-rate Ostlegionen outfitted with obsolete equipment.

Hindered by Allied air supremacy and a large-scale uprising by the French Resistance, the weak German forces were swiftly defeated. The Germans withdrew to the north through the Rhône valley to establish a stable defense line at Dijon. Allied mobile units were able to overtake the Germans and partially block their route at the town of Montélimar. The ensuing battle led to a stalemate, with neither side able to achieve a decisive breakthrough, until the Germans were finally able to complete their withdrawal and retreat from the town. While the Germans were retreating, the French managed to capture the important ports of Marseille and Toulon, soon putting them into operation.

The Germans were not able to hold Dijon and ordered a complete withdrawal from Southern France. Army Group G retreated further north, pursued by Allied forces. The fighting ultimately came to a stop at the Vosges mountains, where Army Group G was finally able to establish a stable defensive line. After meeting with the Allied units from the American Third Army, the Allied forces were in need of reorganizing and, facing stiffened German resistance, the offensive was halted on 14 September.

The Americans considered Operation Dragoon a success. It enabled them to liberate most of Southern France in just four weeks while inflicting heavy casualties on the German forces, although a substantial part of the best German units were able to escape. The captured French ports were put into operation, allowing the Allies to solve their supply problems quickly. The British disagreed with the American assessment due to the weak political impact and lack of movement in Italy.

The idea of invading Southern France had come in 1942 from General George Marshall, the US Army Chief of Staff. It was supported by Joseph Stalin at the Tehran Conference in late 1943. In discussions with Franklin D. Roosevelt, Stalin advocated for the operation as an inherent part of the planned invasion of Normandy, preferring to have the Allies in the far west instead of at an alternative landing in the Balkans, which he considered to be in his zone of influence. Marshall insisted that the southern landing be included in the strategic planning, and Roosevelt found cancelling it to be unpalatable.

During planning the operation was known as "Anvil" to complement Operation Sledgehammer which was at the time the code name for the Normandy invasion. Both plans were later renamed: Sledgehammer to Operation Overlord and Anvil to Operation Dragoon.

Operation Dragoon was controversial from the time it was proposed. The American military leadership and its British counterparts disagreed on the operation. Winston Churchill argued that it would divert military resources from Allied operations in Italy. Instead, he favored an invasion of the oil-producing regions of the Balkans. Churchill reasoned that by attacking the Balkans, the Allies could deny Germany petroleum, forestall the advance of the Red Army, and achieve a superior negotiating position in postwar Europe, all at a stroke.