Which war was Liu Buchan's actions the most prominent?
Liu Buchan:  He is best remembered for his actions as commander of the fleet flagship, the "Dingyuan", during the First Sino-Japanese War. First Sino-Japanese War: The First Sino-Japanese War (25 July 1894 – 17 April 1895) was fought between the Qing Empire and the Empire of Japan, primarily over influence of Korea.
First Sino-Japanese War