The Russo-Japanese War was fought in the waters of the Yellow Sea and the Straits of Tsushima that divide Japan from Korea, and in the mountains of Manchuria, borrowed without permission from China. It was the first war to be fought with modern weapons.
The Japanese had fought the Chinese at sea in 1894 and had gained a foothold in Manchuria by taking control of Port Authur. In 1895, however, Japan was forced to abandon its claims by the Russian...