Northern Name for Battle: Williamsburg Southern Name for Battle: Williamsburg Location of Battle: Williamsburg, VA Date of Battle: May 5, 1862 Northern Commander: McClellan Southern Commander: Longstreet Winner: Tie Northern Troops Involved: 87,000 Southern Troops Involved: 45,000 Northern Casualties: 2,283 Southern Casualties: 1,560 Interesting Facts: This was the first battle of the Peninsula Campaign.