The Battle of Marais Rocheux was a battle of the French and Indian War that was fought between the British Army and the Abenaki Indians in 1757.
In 1757, the French and Indians besieged Colonel George Monro at Fort William Henry in upstate New York. While William Johnson promised to lead reinforcements to the fort's relief, they never arrived, and Monro was forced to accept Marquis Louis-Joseph de Montcalm's generous surrender terms and evacuate the fort with its garrison and their colors. The Abenaki warrior Kesegowaase had no intention of allowing the British to leave, partly because he - an Assassin - was aware of Monro's affiliation with the Templar Order. An all-out ambush of the retreating British soldiers was thwarted by the arrival of Shay Cormac, to whom Monro had written months earlier, and Kesegowaase responded by sending ambushers to harry the retreating British, and also posting snipers at various high points along the British soldiers' path of retreat. Cormac helped to fight off the ambushes and assassinate the sentinels ahead of time, and he invited Monro and his men to take shelter aboard his ship Morrigan. Kesegowaase and several of his men chased the British to the docks, but Jack Weeks threw a gunpowder barrel at the docks and shot it, scarring Kesegowaase and forcing the ambushers to retreat. Weeks and Monro departed for Johnson's trading post at Onaquaga in the Old Growth Forest, where they invited Cormac to rendezvous with them.