Year
Event
1794
Yeomanry formally established under William Pitt the Younger — county volunteer cavalry to defend against French invasion; officers & men largely landowners/farmers providing their own horses
1819
Called out to maintain civil order — notably at Peterloo Massacre; retained key domestic security role throughout early 19C
1830s–1890s
Peace-time social & county institution; musters, parades, little active service; numbers fluctuated
1899–1902
Boer War: Imperial Yeomanry formed — first overseas service; mounted infantry companies sent to South Africa
1908
Haldane Reforms: Yeomanry integrated into Territorial Force — 58 regiments organised as mounted cavalry
1914–1918
WWI: served dismounted as infantry, mounted in Palestine/Macedonia; later as machine-gun & artillery units; heavy casualties
1920s–1930s
Reduced & reorganised; many regiments converted to Royal Horse Artillery batteries
1939–1945
WWII: fully mechanised — armour, artillery, signals, reconnaissance; served North Africa, Europe, Far East
1947
Reconstituted within Territorial Army; postwar shifts to artillery, signals & reconnaissance roles
1967
Major TA cuts — most regiments reduced to squadron or company strength; formation of The Royal Yeomanry
1994
Bicentenary — Mileham’s revised edition published; Yeomanry continues in Army Reserve today