World War II: The Allies commence Operation Shingle, an assault on Anzio and Nettuno, Italy.

The Allies, formally referred to as the United Nations from 1942, were an international military coalition formed during World War II (1939–1945) to oppose the Axis powers. Its principal members were the "Big Four" – the United Kingdom, United States, Soviet Union, and China.

The Battle of Anzio was a battle of the Italian Campaign of World War II that commenced January 22, 1944. The battle began with the Allied amphibious landing known as Operation Shingle, and ended on June 4, 1944, with the liberation of Rome. The operation was opposed by German and by Italian Repubblica Sociale Italiana (RSI) forces in the area of Anzio and Nettuno.

Anzio is a town and comune on Lazio coast region of Italy, about 51 kilometres (32 mi) south of Rome.

Nettuno is a town and comune of the Metropolitan City of Rome in the Lazio region of central Italy, 60 kilometres south of Rome. A resort city and agricultural center on the Tyrrhenian Sea, it has a population of approximately 50,000.