Wusong housed a Qing fortress protecting the entrance to Shanghai. It was captured by the British during the Battle of Woosung on 16 June 1842, amid the First Opium War. During the steamship era, it was the point of departure for large steamers bound for Shanghai. This position caused it to be the site of China's first telegraph wires and first railroad, both running to Shanghai along what is today the route of the Shanghai Metro's elevated Line 3. By 1900, it boasted a lighthouse and a "skeleton" teahouse, as well as a small squadron of war-junks ("ty-mung") of the Imperial Chinese Navy. Tongji University was founded here in 1909.