yeomanry

noun

1. yeomen collectively.
2. a British volunteer cavalry force, formed in 1761, originally composed largely of yeomen, that became part of the British Territorial Army in 1907.

noun

1. yeomen collectively
2. (in Britain) a volunteer cavalry force, organized in 1761 for home defence: merged into the Territorial Army in 1907

n.late 14c., from yeoman + -ry.