While this isn't really that epic it was funny.
Earlier I was playing Assassins Creed 3 and I was in Boston just after Conner gets the full assassin uniform. I go to the Templar Fort and kill all the Redcoats inside. Then when you lower the Union Jack from the Flag Pole you raise the Stars and Stripes despite it being 2 years before that flag was even made. Following this, the area of Boston you're in as well as the fort fills up with Continental Army soldiers. Of course I have a high notoriety at the time and all the soldiers in the fort attack me. I kill a bunch of them and run out into the city where I stumble on numerous Redcoats outside the walls (With some officers and grenadiers) and decide to run back into the fort with them following me. Then follows a big melee inside the fort between me, the British and Continentals. The British win the fight thanks to the 4 Grenadiers that they had, but then I finish them off leaving the fort empty (Temporarily). So basically I started the first skirmish of the Revolutionary War even before the Boston Tea party