There were many reasons why the colonists wanted to be free from Great Britain. The colonists believed the British were violating their rights. The colonists believed the tax laws were illegal since the colonists had no representatives in Parliament that could vote for these laws. This was a right all British citizens had. They couldn’t be taxed unless their representatives could vote for the taxes.
The colonists were also unhappy with other laws that were passed. They didn't like the restrictions of the Proclamation of 1763. They couldn’t move west of the Appalachian Mountains with this law. They were even more upset that they had to provide housing for the troops to enforce this unpopular law.
The colonists believed the British weren’t listening to their concerns. As events got worse, eventually blood was shed. People believed it was time to break free from British rule.
The tactics used by the colonists during the war were more of the tactics associated with guerilla warfare. We would do sneak attacks or hit and run attacks. We would hide behind buildings and in wooded areas and attack the British as they marched in their formal formations. Later on in the war, we tried to surround the British when they made tactical mistakes. This was done at Saratoga and Yorktown. We really didn’t want to fight their army in many full-scale battles. We wanted the British to chase us around. This would drag out the war and hopefully lead to growing dissent in Great Britain. These tactics worked very well.