Like most of John Ford's films, "Drums Along the Mohawk" loosely is based on historical events. A central feature of the plot is the Battle of Oriskany, a pivotal engagement of the Saratoga campaign during the American Revolutionary War, in which a British contingent drove southward from Canada in an attempt to occupy the Hudson Valley and isolate Connecticut, Rhode Island, New Hampshire and Massachusetts from the remaining colonies. A smaller force invaded the Mohawk Valley as a diversion, but the siege of Fort Schuyler depicted in the film had no direct historical counterpart. The actual fort besieged during the battle—Fort Stanwix—was situated far from any civilian settlements, and was attacked by British and Hessian soldiers aided by local Iroquois tribes, not solely by Indians; and was defended by Continental Army soldiers, not militiamen. The Tryon County militia, under General Nicholas Herkimer, did attempt to assist in the fort's defense, but they were ambushed on their way there by a predominantly Indian force at Oriskany, six miles east of Stanwix.