"When Johnny Comes Marching Home Again, Hurrah, Hurrah!" Union soldiers at the end of the Civil War march down Pennsylvania Avenue in 1865
CREDIT: Brady, Mathew, photographer. Washington, D.C. Infantry unit with fixed bayonets followed by ambulances passing on Pennsylvania Avenue near the Treasury, 1865. Prints and Photographs Division, Library of Congress. Reproduction Number LC-DIG-cwpb-02829.