First World War: The Australian and New Zealand Army Corps landed at Anzac Cove while British and French troops landed at Cape Helles to begin the Allied invasion of the Gallipoli peninsula in the Ottoman Empire.

World War I or the First World War, also known as the Great War, was a global conflict between two coalitions: the Allies and the Central Powers. Main areas of conflict included Europe and the Middle East, as well as parts of Africa and the Asia-Pacific. There were important developments in weaponry including tanks, aircraft, artillery, machine guns, and chemical weapons. One of the deadliest conflicts in history, it resulted in an estimated 30 million military casualties, plus another 8 million civilian deaths from war-related causes and genocide. The movement of large numbers of people was a major factor in the deadly Spanish flu pandemic.

The Australian and New Zealand Army Corps (ANZAC) was originally a First World War army corps of the British Empire under the command of the Mediterranean Expeditionary Force. It was formed in Egypt in December 1914, and operated during the Gallipoli campaign. General William Birdwood commanded the corps, which primarily consisted of troops from the First Australian Imperial Force and 1st New Zealand Expeditionary Force, although there were also British and Indian units attached at times throughout the campaign. The corps disbanded in 1916, following the Allied evacuation of the Gallipoli peninsula and the formation of I ANZAC Corps and II ANZAC Corps. The corps was re-established, briefly, in the Second World War during the Battle of Greece in 1941.

The landing at Anzac Cove on Sunday, 25 April 1915, also known as the landing at Gaba Tepe and, to the Turks, as the Arıburnu Battle, was part of the amphibious invasion of the Gallipoli Peninsula by the forces of the British Empire, which began the land phase of the Gallipoli campaign of the First World War.

The landing at Cape Helles was part of the Gallipoli campaign, the amphibious landings on the Gallipoli peninsula by British and French forces on 25 April 1915 during the First World War. Helles, at the foot of the peninsula, was the main landing area. With gunfire support from the Royal Navy, the 29th Division was to advance six mi (9.7 km) along the peninsula on the first day and seize the heights of Achi Baba. The British then planned to capture the forts that guarded the straits of the Dardanelles.