| Regular Army | align=center bgcolor=#bbddbb | Green | |
|---|---|---|---|
| Territorial Force | align=center bgcolor=#bbbbdd | Blue | |
| Yeomanry | align=center bgcolor=#dbdbbb | Yellow | |
| New Army | align=center bgcolor=#ddbbbb | Red | |
| Other | align=center bgcolor=#cccccc | Grey |
List of military divisions - List of British divisions in the First World War
This page is a list of British divisions that existed in the First World War. Divisions were either infantry or cavalry. Divisions were categorised as being 'Regular Army' (professional), 'Territorial Force' (part-time) or 'New Army' (wartime). The 'Territorial' cavalry was referred to as Yeomanry.
| width=10 bgcolor=#bbddbb | 1st Cavalry Division | |
| 2nd Cavalry Division | ||
| 1st Mounted Division - renamed 1st Cyclist Division in July 1916 then broken up in November 1916 | ||
| 2nd Mounted Division - broken up in January 1916 | ||
| 2/2nd Mounted Division - renamed 3rd Mounted Division in March 1916, 1st Mounted Division in July 1916, then The Cyclist Division in September 1917 | ||
| 4th Mounted Division - renamed 2nd Cyclist Division in July 1916, then broken up in November 1916 | ||
| Yeomanry Mounted Division - renamed 1st Mounted Division in April 1918 then 4th Cavalry Division in July 1918 |