Charles succeed his father, James I in 1625. He didn't agree with there being a Parliament and was a strong believer in the kings divine right to rule.
The English Civil War Starts
In 1625-1629 Charles argued with Parliament over money and religious reasons. He refused to let Parliament meet in demanding a new tax for the country.
Charles vs Oliver Cromwell
In 1639 Charles argued with the Scottish people so much that it made them invade England. He didn't have enough money to fight so he had ask Parliament for money. This made Parliament angry with him. His relationship with Parliament became so bad he tried to arrest 5 Parliament members.
Charles Gets Executed
War was being fought by the Parliament called the Roundheads and the Royalists. The very first big battle was fought at Edge Hill (1642) where both sides claimed they won.
Charles believed that the king had the right to do whatever he wanted to do and could not be hurt in any possible way. Oliver Cromwell believed that the Parliament chose the right things and God was on his side.
Charles was tried for treason against his country in 1649, and found guilty for being a tyrant, traitor, and a murderer. In 1649 Charles was beheaded in in front of his own kingdom.