Walter Daniel John Tull was an English professional footballer and British Army officer of Afro-Caribbean descent. He played as an inside forward and half back for Clapton, Tottenham Hotspur and Northampton Town and was the third person of mixed heritage to play in the top division of the Football League after Arthur Wharton and Willie Clarke. He was also the first player of African descent to sign for Rangers in 1917, while stationed in Scotland.

The 17th (Service) Battalion, Middlesex Regiment was an infantry battalion of the Middlesex Regiment, part of the British Army, which was formed as a Pals battalion during the Great War. The core of the battalion was a group of professional footballers, which was the reason for its most commonly used name, The Football Battalion. The 23rd (Service) Battalion, Middlesex Regiment was formed in June 1915 and became known as the 2nd Football Battalion. The battalions fought in the Battle of the Somme in 1916 among others. Soldiers who fought in the 17th and 23rd Battalions included Second Lieutenant Walter Tull, who was possibly the first black infantry officer in the British Army.