From May 31-June 12, 1864, more than 160,000 men clashed at Cold Harbor, Virginia, during the Wilderness Campaign. The 2nd, 5th, 6th, 7th and 36th Wisconsin Infantry regiments took part. June 3 saw some of the worst fighting. When the 36th Wisconsin Infantry moved to the front, its colonel, Frank Haskell of Madison, was shot dead while commanding his troops to take cover. Co.G of the 1st U.S. Sharpshooters, from Wisconsin, was placed in the front of the battle on this day as well.