| Cambridgeshire Militia 4th Battalion, Suffolk Regiment | |
|---|---|
| Active | 1558–1908 |
| Country |  England 1558–1707 Kingdom of Great Britain (1707–1800) United Kingdom (1801–1908) |
| Branch |  Militia |
| Role | Infantry |
| Size | 1 Battalion |
| Garrison/HQ | Ely |
| Engagements | Battle of Worcester Battle of Landguard Fort |
| Commanders | |
| Notable commanders | Oliver Cromwell James Howard, 3rd Earl of Suffolk Thomas Bromley, 2nd Baron Montfort Philip Yorke, 3rd Earl of Hardwicke Col Charles Philip Yorke |
The Cambridgeshire Militia was an auxiliary military regiment in the English county of Cambridgeshire and the Isle of Ely. From their formal organisation as Trained Bands and their service during the Armada Crisis and in the English Civil Wars, the Militia of Cambridgeshire served during times of international tension and all of Britain's major wars. The regiment provided internal security and home defence but sometimes operated further afield, relieving regular troops from routine garrison duties and acting as a source of trained officers and men for the British Army. It later became a battalion of the Suffolk Regiment until its final disbandment in 1908.