No, he was a Confederate.
You could say he helped the Union by leading the Army of Tennessee to disaster.
John Bell Hood was a Confederate general during the American Civil War. In the Battle of Nashville during December 1864 he was defeated by Union Major General George H. Thomas.
The Union troops under George Thomas. John Hood's Army of Tennessee was totally routed.
Lt Gen John Bell Hood
he never did
Union
Nothing
John Bell Hood was a Confederate general during the American Civil War. He led the Army of Tennessee in 1864. In the Battle of Nashville during December 1864, General Hood and the Army of Tennessee were defeated by Union forces led by Major General George H. Thomas.
John B. Hood .
John Brown's body.
John Pope (Union)
Originally Joseph E. Johnston, until he was replaced by John Hood.
The Army of Tennessee, commanded by John B. Hood