The Queen's Own Dorset Yeomanry was a yeomanry regiment of the British Army founded in 1794 as the Dorsetshire Regiment of Volunteer Yeomanry Cavalry in response to the growing threat of invasion during the Napoleonic wars. It gained its first royal association in 1833 as The Princess Victoria's Regiment of Dorset Yeomanry Cavalry, and its second, in 1843, as the Queen's Own Regiment of Dorset Yeomanry Cavalry.