Union troops advanced on Atlanta between May and September 1864. This scene was probably drawn in July or August. The artist was Dr. J. S. Trepler of the 73rd Pennsylvania Volunteers Infantry, XX Corps, Army of the Cumberland. Troop Movements of the 73rd Pennsylvania, 1864: Duty in Lookout Valley till May. 1864 Atlanta (Ga.) Campaign May 1-September 8. Demonstration on Rocky Faced Ridge May 8-11. Dug Gap or Mill Creek May 8, Battle of Resaca May 14-15. Near Cassville May 19. New Hope Church May 25. Operations on line of Pumpkin Vine Creek and battles about Dallas New Hope Church and Allatoona Hills May 26-June 5. Operations about Marietta and against Kennesaw Mountain June 10-July 2. Pine Hill June 11-14. Lost Mountain June 15-17. Gilgal or Golgotha Church June 15. Muddy Creek June 17. Noyes Creek June 19. Kolb's Farm June 22. Assault on Kennesaw June 27. Ruff's Station or Smyrna Camp Ground July 4. Chattahoochie River July 5-17. Peach Tree Creek July 19-20. Siege of Atlanta July 22-August 25. Operations at Chattahoochie River Bridge August 26-September 2. Occupation of Atlanta September 2-November 15. Expedition to Tuckum's Cross Roads October 26-29. Near Atlanta November 9. March to the sea November 15-December 10. Siege of Savannah December 10-21.