From Bellefonte Station, the 30th Ohio moved to Larkin's Ferry on January 26, 1864, and then to Cleveland, Tennessee. Around this time, a number of 30th Ohioans re-enrolled for additional tours of duty, and were rewarded with veterans' furloughs, which they took during April and May of that year. Assigned with other Union troops to the Atlanta Campaign from May 1 through September 8, the 30th Ohioans were involved, from May 8–13, with operations at Resaca, and participated in the Battle of Resaca from May 14–15. Advancing on Dallas from May 18–25, they then engaged in operations at Pumpkin Vine Creek, Dallas, New Hope Church, and Allatoona Hills through June 5 and in operations at Marietta and Kennesaw Mountain from June 10 through July 2, as well as at Nickajack Creek (July 2–5), Ruff's Mills (July 3–4), and the Chattahoochie River (July 5–17). Fighting in the Battle of Atlanta on July 22, they then were engaged in combat actions at Ezra Chapel during the Siege of Atlanta, an entrenchment which lasted until August 25. Participating in the flanking of Jonesboro from August 25–30 and the Battle of Jonesborough from August 31 through September 1, they were also involved in Union operations at Lovejoy Station (September 2–6).