Mercian Yeomanry
| Date | Unit | Higher Formation |
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| . | The Mercian Yeomanry | . |
| 1971.11.01 | Formed as the fourth yeomanry regiment in the Army by reconstitution as squadrons of old regiments which had been reduced to cadre in 1969 | . |
| . | A (Warwickshire and Worcestershire Yeomanry) Squadron at Coventry and Stourbridge, formed from The Queen's Own Warwickshire and Worcestershire Yeomanry, plus X Troop at Birmingham from The Warwickshire Regiment RA | . |
| . | B (Staffordshire Yeomanry) Squadron at Tipton and Stafford and Lichfield | . |
| . | C (Shropshire Yeomanry) Squadron at Shrewsbury, Oswestry and Wellington | . |
| 1971.10.21 | Title confirmed as The Mercian Yeomanry, retroactive to 1 April 1971 | . |
| 1973.05.25 | Redesignated The Queen's Own Mercian Yeomanry | . |
| 1982 | Regiment re-roled as a light Reconnaissance Regiment in the Royal Armoured Corps | . |
| 1988.02.09 | D (Home Service Force) Squadron formed at Telford by rebadging of coy from RAOC | . |
| 1992.11.01 | As result of Options for Change the regiment amalgamated with The Duke of Lancaster'ÂÂs Own Yeomanry to form The Royal Mercian and Lancastrian Yeomanry | . |
| . | Squadrons redesignated as A Squadron, B Squadron and HQ Squadron The Royal Mercian and Lancastrian Yeomanry respectively | . |
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