The 21st Wisconsin joined Sherman's flanking maneuver at the Battle of Rocky Face Ridge, which forced the Confederate defenders to retreat to Resaca, Georgia, and joined the assault on Resaca on May 14, which forced the Confederates to retreat once again. At Pumpkin Vine Creek during the Battle of Dallas on May 27, the 21st Wisconsin scattered a band of Confederate skirmishers and occupied a strategic hill, where they were under fire for six days during the siege. The Confederates again retreated from Dallas and were pursued to fortifications at Kennesaw Mountain, near Marietta, Georgia.