Enlisting on 8 September 1915, Alfred Seymour Shepherd served with the Australian Infantry before his transfer to the Royal Flying Corps on 23 October 1916. On 25 April 1917, he was posted to 29 Squadron as a Nieuport scout pilot, becoming a flight commander on 13 July 1917. Scoring ten confirmed victories, all of his victims flew the Albatros D.III. On the evening of 20 July 1917, Shepherd was killed in action when his Nieuport 23 was shot down by an Albatros D.V flown by Alfred Niederhoff of Jasta 11.
Military Cross (MC)
2nd Lt. Alfred Seymour Shepherd, R.F.C., Spec. Res.
For conspicuous gallantry and devotion to duty. While on balloon attack he came under heavy fire from a rocket battery. He attacked this battery from a low altitude, silencing it, and dispersing the gunners. He then returned to the attack on a balloon, and fired all his ammunition, and though his machine was badly hit, crossed the line at 100 feet.
2nd Lt. Alfred Seymour Shepherd, M.C., R.F.C., Spec. Res.
For conspicuous gallantry and devotion to duty on numerous occasions when engaged in combat with hostile aircraft. Though surrounded by enemy machines, he continued to fight for nearly an hour with the utmost gallantry and determination against two hostile formations, finally bringing down one of the enemy out of control. Within a month he brought down seven hostile machines completely out of control.