During the Battle of Bunker Hill, the British suffered more casualties than the American forces, experiencing approximately 1,000 casualties compared to around 400 for the Americans.

This significant loss for the British was shocking, given their numerical advantage and expectations of an easy victory. The British troops faced fierce resistance from American militia who were well-entrenched and utilized effective defensive tactics. The high casualty rate among the British highlighted the resolve and fighting spirit of the American forces, demonstrating that the colonists could stand up to a professional army, ultimately changing the perception of the Revolutionary War's potential outcomes.