The battle was marked by some of the fiercest fighting of the War. As such, the Cowboys have some of the longest and fiercest rivalries in the sport. It was the site of one of the fiercest battles of the Six-Day War. It is considered among the fiercest and longest-running rivalries in American soccer. One of the fiercest rivalries is with Durham's Duke University. It is considered one of the fiercest rivalries in English football. To this day, the contest is one of the fiercest rivalries in sport. The oldest and fiercest rivalry is with Millwall. The rivalry between Red Star and Partizan is one of the fiercest in world football. One of Pitt's fiercest rivals has been with the West Virginia Mountaineers. The rivalry is generally considered to be one of the fiercest in the NHL. The fiercest fighting once again took place in Cholon. Libya saw some of the fiercest fighting of the North African Campaign. The superderby is known worldwide as one of world football's fiercest and most important derbies. Millwall's fiercest rival is West Ham United.