What was the first major battle of the american revolutionary war?

The first major battle of the war was the Battle of Bunker Hill which was in June of 1775. It was one of my favorite battles to study. Because of how the colonist held their ground for so long. There were an estimated of only 400 colonist causalities which the British Redcoats had over a thousand casualties. This battle gave colonist much confidence and it taught themselves their sheer willpower to for freedom.