after destroying three arches of the old bridge, Heidelberg's treasured river crossing. They also destroyed the more modern bridge downstream. The U.S. Army (63rd Infantry, 7th Army) entered the town on March 30, 1945. The civilian population surrendered without resistance. Heidelberg, unlike most German cities and towns, was spared from Allied bombing raids during the war. A popular belief is that Heidelberg escaped bombing because the U.S. Army wanted to use the city as a garrison after the war, but, as Heidelberg was neither an industrial center nor a transport hub, it did not present a tactical or strategic target. Other notable university towns, such as Tübingen and Göttingen, were spared bombing as well. Allied air raids focused extensively on the nearby industrial cities of Mannheim and Ludwigshafen. The U.S. Army may have chosen Heidelberg as a garrison base because of its excellent infrastructure, including the Heidelberg–Mannheim Autobahn (motorway), which connected to the Mannheim–Darmstadt–Frankfurt Autobahn, and the U.S. Army installations in Mannheim and Frankfurt. The intact rail infrastructure was more important in the late 1940s and early 1950s when most heavy loads were still carried by train, not by truck. Heidelberg had the untouched Wehrmacht barracks, the "Grossdeutschland Kaserne" which the US Army occupied soon after, renaming it the Campbell Barracks. History after 1945 In 1945, the university was reopened relatively quickly on the initiative of a small group of professors, among whom were the anti-Nazi economist Alfred Weber and the philosopher Karl Jaspers. The surgeon Karl Heinrich Bauer was nominated rector. On 9 December 1945, US Army General George S. Patton was involved in a car accident in the adjacent city of Mannheim and died in the Heidelberg US Army hospital on December 21, 1945. His funeral ceremony was held at the Heidelberg-Weststadt Christuskirche (Christ Church), and he was buried in the 3rd Army cemetery in Luxembourg. During the post-war military occupation, the U.S. Army used the Thingstätte for cultural and religious events. Civilian use started in the early to mid-1980s for occasional concerts and other cultural events. Today, the celebrations on Hexennacht ("Witches' Night"), also called Walpurgis Night), the night of April 30, are a regular "underground" fixture at the Thingstätte. Thousands of mostly young people congregate there to drum, to breathe fire, and to juggle. The event has gained fame throughout the region, as well as a certain notoriety due to the amount of litter left behind.