The Great Train Wreck of 1918 occurred on July 9 in Nashville, Tennessee, when two trains collided on the Nashville, Chattanooga and St. Louis Railway. A passenger train, the No. 4, was traveling at high speed when it crashed into a freight train that had been stopped on the tracks. The impact resulted in the deaths of 101 people and injured over 150 others, making it one of the deadliest train accidents in U.S. history. The disaster was attributed to a miscommunication between the train crews and the dispatcher. Following the wreck, safety regulations were reviewed and improved to prevent similar accidents in the future. The tragedy highlighted the importance of effective communication in railway operations.