Which battle, fought in June 1775, resulted in heavy British losses despite a retreat by Colonial militia?

The battle that took place in June 1775 and resulted in heavy British losses despite a retreat by Colonial militia is indeed the Battle of Bunker Hill. This confrontation was significant as it showcased the determination and capability of the colonial forces, even in the face of a more experienced and better-equipped British army.

During the battle, which occurred primarily on Breed's Hill, the colonial militia, although ultimately forced to withdraw, inflicted substantial casualties on the British troops. The British suffered a significant number of killed and wounded, which was a stark reminder to them and the world that the colonists were willing to fight fiercely for their rights and autonomy.

The battle is often remembered for the famous phrase, "Don't fire until you see the whites of their eyes," illustrating the colonists' commitment to preserving their ammunition. The heavy British losses at Bunker Hill galvanized support for the colonial cause and demonstrated that the conflict would not be easily resolved.