The regiment had its origins in the rifle volunteer corps formed in Cambridgeshire and the Isle of Ely in 1860. By 1880 the volunteer units in the county had amalgamated as the battalion-size 1st Cambridgeshire Rifle Volunteer Corps. In the following year, as part of the Childers Reforms, the 1st Cambridgeshire RVC were nominated as a volunteer battalion of the Suffolk Regiment. In 1887 the unit was renamed as the 3rd Volunteer Battalion, The Suffolk Regiment. The 3rd Volunteer Battalion sent a voluntary detachment of 3 officers and 43 other ranks to reinforce the regular Suffolk Regiment in the Second Boer War between 1899 and 1902. On the formation of the Territorial Force in 1908, following the Haldane Reforms, the 3rd Volunteer Battalion became The Cambridgeshire Battalion, The Suffolk Regiment with its headquarters at Corn Exchange Street in Cambridge. In the following year the Cambridgeshires were constituted a separate regiment, with the title 1st Battalion, The Cambridgeshire Regiment, although remaining part of the "corps" of the regular Suffolk Regiment. The original units were converted by the beginning of 1914 as follows:
1st Cambridgeshire Rifle Volunteer Corps at Cambridge became A and B companies 1st Bn Cambridgeshire Regiment
2nd Cambridgeshire Rifle Volunteer Corps at Wisbech became E company
4th Cambridgeshire Rifle Volunteer Corps at Whittlesey became F company
5th Cambridgeshire Rifle Volunteer Corps at March became G company
6th Cambridgeshire Rifle Volunteer Corps at Ely became H company
8th Cambridgeshire Rifle Volunteer Corps at Cambridge became C and D companies
On the outbreak of the First World War, the Territorial Force was doubled in size, with the Cambridgeshire Regiment forming a 2/1st Battalion. In 1915 a further increase in the size of the TF led to the formation of 3/1st and 4/1st Battalions. The 2/1st Battalion, the 3/1st Battalion and the 4/1st Battalion remained in the United Kingdom throughout the War. 1st Battalion The 1st battalion was based in Cambridge and the outbreak of the war: it formed part of the East Midland Brigade in the East Anglian Division. It landed at Le Havre in France and came under command of the 82nd Brigade in the 27th Division. The battalion transferred to VII Corps in November 1915 and then transferred to 118th Brigade in the 39th Division in February 1916. Troops of the 4th/5th Black Watch, the 1st Cambridgeshire Regiment and the 17th King's Royal Rifle Corps of the 117th Brigade, took part in the capture of Schwaben Redoubt, a fortress dominating Thiepval, in October 1916 during the Battle of the Somme. Three German counter-attacks on 15 October, supported by Flammenwerfer detachments were defeated. C Company of the battalion then performed an important role in the capture of a boiler house and then refused to fall back when they came under counter-attack during the Battle of Passchendaele in July 1917. Some 77 officers and 789 other ranks were killed during the First World War. The Cambridgeshire and Isle of ElyPrisoners of War Help Support Committee supported members of the regiment and their families.
Inter-war period
The Cambridgeshire Regiment like other volunteer battalions returned to a routine of drill nights, weekend training and annual camps. A 1921 recruiting film is held on the East Anglian Film Archive website.
In early 1939, just prior to the outbreak of the Second World War, the Territorial Army was again doubled in size with each unit forming a 2nd Line duplicate. As a consequence, a 2nd Battalion was raised. Following mobilisation both battalions served with the 18th Infantry Division, initially on the Norfolk Coast and were then sent to the Far East where they fought in the Malayan Campaign and the Battle of Singapore. 1st Battalion The Battalion fought at Sime Road Camp in Singapore and defended the camp for two days before being ordered to surrender to the Imperial Japanese Army by the commander of the garrison, Lieutenant GeneralArthur Percival. 2nd Battalion The battalion, commanded by Lieutenant-Colonel Gordon Thorne, was sent to Singapore in early 1942 and reinforced the 15th Indian Brigade at Batu Pahat. The brigade held the town for ten days against attack by the Imperial Japanese Army; some 500 troops from the battalion fought their way back to Singapore and were attacked on all sides at Braddell Road in Singapore before being also ordered to surrender. Some 24 officers and 760 other ranks were killed or died in Japanese captivity during the Second World War.
Post–war
In 1947 the regiment was converted to an artillery role, becoming the 629th Light Anti-Aircraft Regiment, Royal Artillery . In 1956 the regiment returned to its traditional role and designation as 1st Battalion, The Cambridgeshire Regiment . There was a general reduction in the size of the Territorial Army in 1961, and 1st Cambridgeshires were amalgamated with the 4th Battalion, The Suffolk Regiment to form the Suffolk and Cambridgeshire Regiment . This formation was itself disbanded in 1967.