Tug of war is a sport in which two teams compete by pulling on opposite ends of a rope, with the goal of bringing the rope a certain distance in one direction against the force of the opposing team's pull. Practiced in ancient Egypt, China, India and Greece, the sport has ancient origins and has been practiced in various cultures throughout history. It was included in the Summer Olympics from 1900 to 1920, but is no longer part of the Olympic program. Tug of war continues to be practiced in schools, community events, and organized competitions worldwide.