On August 25th 2018, The Dropkick Murphys rocked out the brand new MGM Grand Casino in downtown Springfield, Massachusetts. The outdoor weekend performance was a benefit concert for the Thomas J. Sullivan Foundation. Gunnery Sergeant Sullivan was killed on July 16, 2015 in a domestic terror attack while stationed at the Naval Reserve Center in Chattanooga, Tennessee. Springfield native Sullivan was attempting to save his fellow Marines when he was fatally shot during the assault.