Hertfordshire Yeomanry The Hertfordshire Yeomanry is a British Army unit specializing in artillery and yeomanry that can trace its formation to the late 18th century . First seeing service in the Boer War , it subsequently served in both World Wars . Formation and Early History . At the time of the Hertfordshire Yeomanry ' s formation , King George III was on the throne , William Pitt the Younger was Prime Minister of Great Britain , and across the English Channel , Britain was faced by a French nation that had recently guillotined its King and which possessed a revolutionary army numbering half a million men . The Prime Minister proposed that the English Counties form a force of Volunteer Yeoman Cavalry that could be called on by the King to defend the country against invasion or by the Lord Lieutenant to subdue any civil disorder within the country . Five independent Troops of Yeomanry Cavalry were raised in Hertfordshire in June 1794 . They were disbanded one by one between 1807 and 1824 . In late 1830 and early 1831 seven new troops were formed , four of which were grouped as the South Hertfordshire Corps . Of the three independent Troops only the North Hertfordshire Troop survived . It was amalgamated with the South Hertfordshire Corps to form the Hertfordshire Yeomanry Cavalry in 1871 . Boer War . On 13 December 1899 , the decision to allow volunteer forces serve in the Second Boer War was made . Due to the string of defeats during Black Week in December 1899 , the British government realized they were going to need more troops than just the regular army , thus issuing a Royal Warrant on 24 December 1899 . This warrant officially created the Imperial Yeomanry . The Royal Warrant asked standing Yeomanry regiments to provide service companies of approximately 115 men each . In addition to this , many British citizens ( usually mid - upper class ) volunteered to join the new regiment . Although there were strict requirements , many volunteers were accepted with substandard horsemanship / marksmanship , however they had significant time to train while awaiting transport . The first contingent of recruits contained 550 officer s , 10 , 371 men with 20 battalion s and 4 companies , which arrived in South Africa between February and April 1900 . Upon arrival , the regiment was sent throughout the zone of operations . < br > The Hertfordshire Yeomanry provided troops for the 42nd Company , 12th Battalion . World War I . 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 Hertfordshire Yeomanry . The 1 / 1st was mobilised in August 1914 and attached to the Eastern Mounted Brigade , they later moved to Egypt in January 1915 and joined the Yeomanry Mounted Brigade . The Yeomanry Mounted Brigade moved to Gallipoli as dismounted troops attached to the 2nd Mounted Division and redesignated as the 5th Mounted Brigade . After the evacuation of Gallipoli they returned to Egypt in December 1915 , and were remounted and moved to the Western Frontier Force . In March 1916 the Regiment was split up , RHQ with A Squadron were attached to the 54th Division , later A Squadron joined XXI Corps , Cavalry in Palestine . B Squadron was attached to the 11th Division , in England until on 12 July 1916 joined VI Corps Cavalry , until early in 1917 when it moved to join XVIII Corps , Cavalry . In May 1917 it became GHQ Troops . In July 1917 it returned to Egypt and in May 1918 joined XXI Corps Cavalry in Palestine . D Squadron moved to Mesopotamia , initially on Lines of Communication duties and in July 1916 it was attached to the 13th Division , until December of that year when they moved to III ( Tigris ) Corps Cavalry . In August 1917 they were attached to the 15th Indian Infantry Division , and in May 1918 they were tasked with Lines of Communication duties with the North Persia Force . 2 / 1st Hertfordshire Yeomanry . The 2 / 1st was formed in September 1914 , the regiment remained in the United Kingdom and did not see active service as a regiment , although they did supply drafts of fit troops for service in France in March 1918 . 3 / 1st Hertfordshire Yeomanry . The 3 / 1st was formed in 1915 , they remained in the United Kingdom until being absorbed by the 6th Reserve Cavalry Regiment in February 1917 . Between The Wars . On the reforming of the TA , the 14 senior Yeomanry Regiments remained as horsed cavalry regiments ( 6 forming the 5th and 6th Cavalry Brigade s ) the remaining Yeomanry Regiments would be re rolled as Artillery . The Hertfordshire Yeomanry was one of the regiments now re - designated and formed part of the Royal Artillery . World War II . During World War Two there were two regiments associated with the Hertfordshire Yeomanry : the pre - war 86 ( East Anglian ) ( Herts Yeo ) Field Regiment RA ( TA ) and a second line unit was formed , the 135 ( East Anglian ) ( Herts Yeo ) Field Regiment RA ( TA ) . 86 ( East Anglian ) ( Herts Yeo ) Field Regiment RA ( TA ) . The 86 ( East Anglian ) ( Herts Yeo ) Field Regiment was mobilised in September 1939 , its three batteries were the ; In 1940 the regiment was equipped with 8 x 4 . 5 inch Howitzers & 4 x 18 / 25 pounder guns , it remained in the United Kingdom until 1944 being attached to various divisions ; The 54th ( East Anglian ) Infantry Division , 42nd ( East Lancashire ) Division and the 42nd Armoured Division . During this time it used a number of new self - propelled artillery vehicles Bishop , Priest and the Sexton self - propelled guns . In 1944 it was attached to British 2nd Army and participated in the following battles Normandy , Antwerp , Nimegen , Ardennes , Rhine Crossing , Bremen . 135 ( East Anglian ) ( Herts Yeo ) Field Regiment RA ( TA ) . The 135 ( East Anglian ) ( Herts Yeo ) Field Regiment RA was formed in September 1939 it consisted of three batteries , the ; The Regiment remained in the United Kingdom until 1941 when it was sent to India and joined the 18th Indian Division and deployed to Singapore it was still serving with the 18th Indian Division when Singapore was captured by the Japanese . Bridge on the River Kwai . Lieutenant Colonel Philip Toosey , in 1941 was appointed to command the 135th Hertfordshire Yeomanry regiment . In October 1941 , his unit was shipped to the Far East . He was awarded the Distinguished Service Order for heroism during the defence of Singapore . Because of his qualities of leadership , his superiors ordered him on 12 February 1942 to join the evacuation of Singapore , but Toosey refused so that he could remain with his men during their captivity . He was the senior Allied officer in the Japanese prisoner - of - war camp at Tha Maa Kham ( known as Tamarkan ) in Thailand during World War II . The men at this camp built the Bridge on the River Kwai which was described in a book by Pierre Boulle and later in an Oscar - winning film in which Alec Guinness played the senior British officer . Both the book and film outraged former prisoners because Toosey did not collaborate , unlike the fictional Colonel Nicholson . Post war . When the Territorial Army was reformed after the war the Hertfordshire Yeomanry was amalgamated with the Bedfordshire Yeomanry and formed 201 ( Hertfordshire and Bedfordshire ) Yeomanry Battery Royal Artillery Volunteers which is part of the 100th ( Yeomanry ) Regiment Royal Artillery ( Volunteers ) . 201 Battery , is based in Luton and Romford and is affiliated to the 7 Parachute Regiment , Royal Horse Artillery , which it supports on operations .