Chickamauga and Chattanooga National Military Park commemorates the Civil War campaign for control of Chattanooga, prized by the Union as the gateway to the Deep South. Union forces had taken Chattanooga, but they were later defeated in the Battle of Chickamauga, September 18-20, 1863 and placed under siege in the town of Chattanooga for two months. With the arrival of reinforcements, the Union army broke out by driving the confederates from positions surrounding Chattanooga, November 23-25, 1863. These actions secured Chattanooga for the Union, providing the supply base and gateway needed for the Union thrust southward the following Spring. This collectible key chain honors the lives lost in the Battle of Chickamauga. It measures approximately 1 1/2 inches in diameter.