The Battle of Island Number Ten was an engagement at the New Madrid or Kentucky Bend on the Mississippi River during the American Civil War, lasting from February 28 to April 8, 1862. The position, an island at the base of a tight double turn in the course of the river, was held by the Confederates from the early days of the war. It was an excellent site to impede Union efforts to invade the South along the river, as vessels would have to approach the island bows on and then slow down to make the turns. For the defenders, it also had an innate weakness in that it depended on a single road for supplies and reinforcements, so that if an enemy force could cut that road, the garrison would be trapped.