Leonard Maurice Keysor, VC was a British-born Australian recipient of the Victoria Cross, the highest award for gallantry "in the face of the enemy" that can be awarded to British and Commonwealth forces. Born in England, Keysor emigrated to Australia shortly before the outbreak of the First World War. He enlisted in the First Australian Imperial Force in August 1914 and served in Egypt before landing at Gallipoli, Turkey at the beginning of the campaign. On 7 August 1915 at Lone Pine, while serving as an acting lance-corporal, 29-year-old Keysor performed an act of bravery for which he was awarded the Victoria Cross. Later in the war he took part in the fighting in France, serving in the trenches along the Western Front. He would later achieve the rank of lieutenant before being discharged from the army on medical grounds at the end of the war.

The Battle of Lone Pine was fought between Australian and New Zealand Army Corps (ANZAC) and Ottoman Empire forces during the Gallipoli Campaign of the First World War, between 6 and 10 August 1915. The battle was part of a diversionary attack to draw Ottoman attention away from the main assaults being conducted by British, Indian and New Zealand troops around Sari Bair, Chunuk Bair and Hill 971, which became known as the August Offensive.