The Duke of York's Own Loyal Suffolk Hussars was a Yeomanry regiment of the British Army. Originally formed as a volunteer cavalry force in 1793, it fought in the Second Boer war as part of the Imperial Yeomanry. In the World War I the regiment fought at Gallipoli, in Palestine and on the Western Front. The unit was subsequently converted into a Royal Artillery unit, serving in the anti-tank role North Africa, Italy and France during World War II. The lineage is maintained by No. 677 Squadron AAC.

The Imperial Yeomanry was a volunteer mounted force of the British Army that mainly saw action during the Second Boer War. Created on 2 January 1900, the force was initially recruited from the middle classes and traditional yeomanry sources, but subsequent contingents were more significantly working class in their composition. The existing yeomanry regiments contributed only a small proportion of the total Imperial Yeomanry establishment. In Ireland 120 men were recruited in February 1900. It was officially disbanded in 1908, with individual Yeomanry regiments incorporated into the new Territorial Force.