4-Mercy at Appomatto . A civil war song The Battle Cry of Freedom o George F. Root was probably the most important writer of patriotic music from this era e According to the Chicago Tribune, the popular Lumbard Brothers introduced The Battle Cry of Freedom at a Chicago war rally on July 24, 1862. The rallying spirit of the song was immediately applauded, and quickly spread across the Union camps, parlors at home, and other rallies throughout the union W BTL E The end of A civil war song.W B T L E The Battle Cry of Freedom George F. Root was probably the most important writer of patriotic music from this era. According to the Chicago Tribune, the popular Lumbard Brothers introduced The Battle Cry of Freedom at a Chicago war rally on July 24, 1862. The rallying spirit of the song was immediately applauded, and quickly spread across the Union camps, parlors at home, and other rallies throughout the Union. The end of A civil war song. George F. Root I. A civil war song Lesson 14 – Mercy at Appomattox