Battle of Pea Ridge, (March 7–8, 1862), bitterly fought American Civil War clash in Arkansas, during which 11,000 Union troops under General Samuel Curtis defeated 16,000 attacking Confederate troops led by Generals Earl Van Dorn, Sterling Price, and Ben McCulloch. Following a fierce opening assault from the rear that almost overwhelmed Curtis’s forces, the outnumbered Union troops rallied. After a desperate struggle with severe losses on both sides, Union forces counterattacked on March 8. The Confederates were forced to retreat, thus thwarting their hopes of regaining control of Arkansas.