The British couldn't focus on the colonists because they were so busy fighting wars in Europe. They were too far to communicate with them. After the war they saw the colonists as a much needed source of money.
Many acts against the colonist were made from 1764 to 1775. The colonists were losing money due to the acts and the complaining made the king feel that they are ungrateful.
Beginning of the American Revolution
Because of these acts, groups were made by the colonists. The sons of liberty was one of the groups that protested against the british. It organized resistance of the stamp act.
Declaration of independence
The British decided to take action after the colonists kept resisting. The Boston Massacre happened in 1770, British troops opened fire on protesters.
The British's actions on the colonists had started the first continental congress. On April 19th, 1775 a fight broke out between Great Britain and American colonies in Lexington and Concord.
The second continental congress had chosen to resist the British. The colonists met in pennsylvania and sent angry letters to the king saying how they wouldn't be under british control any longer and how they would become 13 separate states.