"Battle Cry of Freedom" is a song written by George F. Root during the American Civil War. It became popular among Union soldiers and served as a rallying cry for those fighting against the Confederacy. The song's themes of patriotism and freedom resonated with many, making it a significant piece of wartime music. The song was first published in 1862 and quickly gained traction, being performed at various events and gatherings. Its catchy melody and powerful lyrics helped boost morale among troops and supporters of the Union cause, solidifying its place in American history as a symbol of the fight for freedom.