William Peter Cochrane (SN 4084) was born in Ballarat where he enlisted as a 22 year old carpenter on January 11th, 1916. Initially posted to the 21st Battalion, 10th Reinforcement, his unit left Melbourne on board the Wiltshire in March. In June, after training in Alexandria, he was posted to France with the 5th Pioneer Battalion. He spent much of the next 12 months in and out of hospital in England, suffering from an inguinal hernia. 1918 saw him back in France with the 5th Machine Gun Battalion where he suffered a penetrating gunshot wound to the chest, resulting in his transfer back to England in September and his eventual repatriation to Australia on board the Gaikain December. He was discharged on February 14th 1919.