1st Mounted Division

1st Mounted Division 1st Cyclist Division
Active	5 August 1914 – 16 November 1916
Country	United Kingdom
Branch	British Army
Type	Yeomanry Bicycle infantry
Size	Division
Service	World War I
Commanders
Notable commanders	Edwin Alderson Robert George Broadwood

The 1st Mounted Division was a Yeomanry Division of the British Army active during World War I. It was formed in August 1914 for the home defence of the United Kingdom from four existing mounted brigades of the Territorial Force, each of three regiments of Yeomanry. The divisional order of battle changed often, as the 1st Line brigades left for service overseas and were replaced by 2nd Line formations. It was converted to the 1st Cyclist Division in July 1916, and was broken up in November 1916 without being involved in active service. It remained in East Anglia throughout its existence.

An unrelated 1st Mounted Division was formed in July 1916, from the 3rd Mounted Division, lasting until September 1917. Another incarnation of 1st Mounted Division was created in April 1918 from the Yeomanry Mounted Division, lasting until July 1918.

The Mounted Division was formed on 5 August 1914, immediately after the outbreak of World War I, from four existing mounted brigades of the Territorial Force – Eastern, 1st South Midland, 2nd South Midland, and Notts. and Derby. It was assembled in East Anglia with Headquarters at Bury St Edmunds and the brigades at Ipswich, Diss and two at Bury. The division was to spend its entire existence in East Anglia.

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