The East Riding of Yorkshire Yeomanry was a unit of the British Army formed in 1902. Units of Yeomanry Cavalry were raised in the East Riding of Yorkshire in the 18th and early 19th centuries at times of national emergency: the Jacobite Rising of 1745, the French Revolutionary Wars and the Napoleonic Wars. These were stood down once each emergency was over. The East Riding of Yorkshire Yeomanry, was established in 1902, and this saw action during the First World War both in the mounted role and as machine gunners.