by the king
loyalists
Loyalists
Tories.
loyalists or tories
Tories is a slightly derogatory name for the Conservative Party.
The Tories sided with Britain.
the Tories
Whigs
The MP's that became known as the Tories were the King's allies in parliament. The Whigs, who were the opposition nicknamed the government 'Tories' originally as an insult after a notorious band of thieves and bandits from Donegal in Ireland.
One can find information on Tories (British Political Party) from: Wikipedia, Conservatives, Blogging Tories, Tories Fighting For The King, History Learning Site, Conservative Homes.
A+ answer: Tories
They were called Tories or Loyalists or sometimes, King's men.