In the organization of the British army over the years, they formed Regiments. Some regiments were selected to guard the King/Queen and were called Guards. Units formed from local militia were Yeomanry units. The equivalent in the US is National Guard units.
Yeomanry refers to a British volunteer cavalry force that was traditionally composed of land-owning individuals who provided their own horses. It originated in the late 18th century and served as a reserve force for the regular army. Today, Yeomanry regiments continue to exist within the British Army Reserve, providing support to the regular army in a variety of roles.
Essex Yeomanry was created in 1797.
Lanarkshire Yeomanry was created in 1819.
Norfolk Yeomanry was created in 1901.
Royal Yeomanry was created in 1967.
Imperial Yeomanry was created in 1899.
Imperial Yeomanry ended in 1908.
Staffordshire Yeomanry ended in 1973.
Cheshire Yeomanry ended in 1999.
Lincolnshire Yeomanry was created in 1794.
Lincolnshire Yeomanry ended in 1920.
Leicestershire Yeomanry was created in 1794.
Derbyshire Yeomanry was created in 1794.