So during march 5th 1770, British soldiers where in the town of Boston and since that the 13 colonies hated the Brits, they decided to mess with the British soldiers like throwing stuff at them and getting in their face. The crowd started forming and circling the soldiers, mocking them and stuff. Later then, the British fired without orders, killing many innocents. The british army general noticed this and told them to stop, they didnt stop. So the british soldiers started firing again and yea. Thats the Boston Massacre.