The Battle of Frenchtown, also known as the Battle of the River Raisin or the River Raisin Massacre, was a series of conflicts that took place from January 18–23, 1813 during the War of 1812. It was fought between the United States and a British and Native American alliance near the River Raisin in Frenchtown, Michigan Territory (present-day Monroe, Michigan). The battle on January 22 had the highest number of fatalities of any battle during this war.