Kennesaw Mountain, Battle of June 27, 1864, a battle of the American Civil War during the approach of General William T. Sherman to Atlanta. General Joseph E. Johnston's Confederate army had dropped back before a series of flanking maneuvers by Sherman's numerically superior forces and taken up a defensive position about 16 miles (26 km) northwest of Atlanta, on Kennesaw Mountain and to its southwest and south. A period of rainy weather made troop movements difficult, and Sherman decided to try a frontal assault on the strongest part of the Confederate line. Within two hours his forces suffered more than 2,000 casualties and were beaten back. Several days later, the weather having turned dry again, Sherman resumed his flanking maneuvers and forced Johnston to drop back to the Chattahoochee River. The battle site was made a national battlefield in 1947.