Allied invasion of Italy

The 1943 Allied campaign to land on and advance into mainland Italy, opening a major front against Axis forces during World War II.

Operation Avalanche: The Allied amphibious landing at Salerno on 9 September 1943. Its beachhead became the main landing through which the Allies entered mainland Italy.
Casablanca Conference: The January 1943 meeting where Allied leaders agreed to demand Axis surrender and continue operations in the Mediterranean. Its strategic discussions shaped the choice to invade Sicily and then strike Italy.
Harold Alexander: The British field marshal who commanded Allied ground forces in Italy for much of the campaign. He directed the multinational armies advancing from Salerno toward Rome.
Battle of Salerno: The September 1943 battle in which German forces tried to destroy the Allied beachhead near Salerno. The outcome determined whether the largest mainland landing could survive its first days.
Italian Social Republic: A German-backed fascist state in northern Italy led by Benito Mussolini from 1943 to 1945. German occupation after Italy's surrender divided the country and sustained Axis resistance.
Operation Baytown: The British Eighth Army's crossing of the Strait of Messina into Calabria on 3 September 1943. This opening landing began the mainland campaign before the larger Salerno assault.
Allied invasion of Sicily: The July–August 1943 Allied campaign to capture Sicily from Axis forces. The island's capture provided a base for the subsequent invasion of mainland Italy.
Mark W. Clark: The American general who commanded the U.S. Fifth Army during the Salerno landing and advance toward Rome. His decisions at Salerno and during the drive on Rome became central to the campaign's conduct.
Volturno Line: A German defensive position along the Volturno River in southern Italy in 1943. It was one of the first river barriers the Allies had to cross after Salerno.
Italian campaign (World War II): The Allied military campaign to defeat German forces in Italy from 1943 until the end of World War II in Europe. The invasion began a campaign that continued long after the initial landings.

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Coalition warfareBroader topic: British and American forces had to coordinate operations despite differing command structures and priorities.