In accordance with the
Territorial and Reserve Forces Act 1907 (
7 Edw. 7, c.9) which brought the
Territorial Force into being, the TF was intended to be a home defence force for service during wartime and members could not be compelled to serve outside the country. However, on the outbreak of war on 4 August 1914, many members volunteered for
Imperial Service. Therefore, TF units were split in August and September 1914 into 1st Line (liable for overseas service) and 2nd Line (home service for those unable or unwilling to serve overseas) units. Later a 3rd Line was formed to act as a reserve, providing trained replacements for the 1st and 2nd Line regiments.
1/1st Royal Buckinghamshire Yeomanry The regiment was mobilised with its brigade on 4 August 1914 upon the outbreak of
World War I. In April 1915 the 2nd Mounted Division moved to
Egypt arriving at
Alexandria between 19 and 21 April and was posted to
Cairo by the middle of May. The regiment was dismounted in August 1915 and took part in the
Gallipoli Campaign. It left a
squadron headquarters and two
troops (about 100 officers and men) in Egypt to look after the horses. They landed at "A" Beach,
Suvla Bay on 18 August and moved into
bivouacs at Lala Baba on 20 August. On 21 August it advanced to Chocolate Hill via Salt Lake and Hetman Chair and took part in the attack on Scimitar Hill. The complete brigade was transferred to the newly formed
Yeomanry Mounted Division on 27 June 1917, joining it at el Maraqeb. From 31 October it took part in the
Third Battle of Gaza, including the
Battle of Beersheba and the Capture of the Sheria Position. It took part in the
Battle of Mughar Ridge on 13 and 14 November and the
Battle of Nebi Samwil from 17 to 24 November. From 27 to 29 November, it withstood the Turkish counter-attacks during the
Capture of Jerusalem. In March 1918 the
1st Indian Cavalry Division was broken up in France. The British units (notably
6th (Inniskilling) Dragoons,
17th Lancers, 1/1st
Queen's Own Yorkshire Dragoons and
A,
Q and
U Batteries RHA) remained in France and the Indian elements were sent to Egypt. By an
Egyptian Expeditionary Force GHQ Order of 12 April 1918 the mounted troops of the EEF were reorganised when the Indian Army units arrived in
theatre. On 24 April 1918 the Yeomanry Mounted Division was
indianized and its title was changed to 1st Mounted Division, They remained on the
Western Front for the rest of the war. At the
Armistice, it was serving as Army Troops with the
Second Army.
2/1st Royal Buckinghamshire Yeomanry The 2nd Line regiment was formed at Buckingham on 9 September 1914. In July 1916 there was a major reorganization of 2nd Line yeomanry units in the United Kingdom. All but 12 regiments were converted to
cyclists; the 2/1st Royal Buckinghamshire Yeomanry remained mounted and transferred to the
1st Mounted Brigade in the new 1st Mounted Division (3rd Mounted Division redesignated) at
Brentwood. In March 1917 it moved to
Much Hadham and in April back to Brentwood. In August 1917 the regiment was converted to a
cyclist unit in
11th Cyclist Brigade,
The Cyclist Division and was stationed at
Canterbury. There were no further changes before the end of the war. It began disbanding in March 1919.
3/1st Royal Buckinghamshire Yeomanry The 3rd Line regiment was formed in 1915; in the summer it was affiliated to the
7th Reserve Cavalry Regiment at
Tidworth. Early in 1917 it was absorbed into the
3rd Reserve Cavalry Regiment at
Aldershot. ==Between the wars==