Field Marshal Sir Gerald Walter Robert Templer, KG, GCB, GCMG, KBE, DSO (11 September 1898 – 25 October 1979) was a senior British Army officer who fought in both the First World War and the Second World War, where he commanded the 56th (London) Infantry Division during the Italian Campaign. He is best known for his defeat of the guerrilla rebels in Malaya between 1952 and 1954. As Chief of the Imperial General Staff (CIGS) from 1955–58, he was Prime Minister Anthony Eden's chief military adviser during the Suez Crisis.
Born the son of Lieutenant Colonel Walter Francis Templer and Mabel Eileen Templer (née Johnston) and educated at Wellington College and the Royal Military College, Sandhurst, Templer joined the British Army during the First World War and was commissioned as a second lieutenant into his father's regiment, the Royal Irish Fusiliers, on 16 August 1916. He was promoted to lieutenant on 16 February 1918.