Near Gaines' Mill was the Battle of Cold Harbor, the final battle of Union Lieut. Gen. Ulysses S. Grant's 1864 Overland Campaign. This was fought over the same ground as the Battle of Gaines' Mill. The area identified as part of the battlefield for "Second Cold Harbor" stretches from near the intersection of Walnut Grove Road and Mechanicsville Turnpike to "Turkey Hill" near the Rt. 156 crossing of the Chickahominy River. An area of the battlefield which saw heavy casualties and a nearby post-war National cemetery are preserved as historic monuments.