Battle of Four Lakes, near present-day Spokane, WA, features 500 U. S. soldiers defeating a similar-sized contingent of American Indians. The soldiers won because their new rifle-bored muskets exceeded the range of the Indians smooth-bore weapons
Battle of Chantilly
Union Major General Phillip Kearny [US] is shot and killed when he crosses Rebel lines while riding his horse. Gen Issac I. Stevens [US] is also killed