The Public Schools Battalions were Pals battalions of the British Army during the First World War. They were raised as part of Kitchener's Army, originally made up exclusively of former public schoolboys. When the battalions were taken over by the British Army they became variously the 16th (Service) Battalion (Public Schools), Middlesex Regiment and 18th (Service) Battalion (1st Public Schools), 19th (Service) Battalion (2nd Public Schools), 20th (Service) Battalion (3rd Public Schools) and 21st (Service) Battalion (4th Public Schools), Royal Fusiliers.