Shipwrecks were common around Cape Eluanbi in the early modern era owing to the nearby Qixingyan reefs and strong currents. The hostile native reactions to these accidents rose to the level of international incidents in the case of the "Rover" and a Ryukyu convoy, which prompted invasions from the United States and Japan in 1867 and 1874. In the latter case, the Qing Dynasty explicitly disavowed responsibility for native-held areas on Taiwan Island, creating a power vacuum that threatened Japanese or European colonization of the region. Following the advice of Charles Le Gendre, the American consul at Xiamen (then known as "Amoy"), the Viceroy of Liangjiang, Shen Baozhen, began constructing coastal defenses to improve the situation.