royalist supports a particular monarch as head of state for a particular kingdom, or of a particular dynastic claim. In the abstract, this position is royalism. It is distinct from monarchism, which advocates a monarchical system of government, but not necessarily a particular monarch. Most often, the term royalist is applied to a supporter of a current regime or one that has been recently overthrown to form a republic.
In the United Kingdom today, the term is almost indistinguishable from "monarchist," because there are no significant rival claimants to the throne. Conversely, in 19th-century France, a royalist might be either a Legitimist, Bonapartist, or an Orléanist, all being monarchists.
The Royalist side, or the Cavaliers, were the predominantly Catholic side.
As long as the King lived a Royalist threat would exist insisting on his return to the throne.
This is almost a serious answer: Their uniforms were much prettier ! But if you want to be on the winning side, more often then not then it's the drab but effective Parliamentary army.
There was no king in the american civil war, but of course America is not the only country on the planet, neither is it the only country to have a Civil War. In The English Civil War, supporters of King Charles I were "Royalists" or "Cavaliers; supporters of his opponent, Oliver Cromwell, were called "Roundheads."
It had to be protected against royalist counter revolution.
Charles was a royalist
Royalist
John Harris - Royalist - died in 1649.
John Harris - Royalist - was born in 1596.
Thomas Ingram - Royalist - was born in 1614.
William Ashburnham - royalist - died in 1679.
Thomas Colepeper - Royalist - was born in 1578.
John Duckett - Royalist - was born in 1580.
John Duckett - Royalist - died in 1648.
William Godolphin - Royalist - died in 1663.
William Godolphin - Royalist - was born in 1605.
Thomas Gardiner - Royalist - died in 1662.