The major theatres of operations were the Liaodong Peninsula and Mukden in Southern Manchuria and the seas around Korea , Japan and the Yellow Sea .

Vladivostok was operational only during the summer , whereas Port Arthur , a naval base in Liaodong Province leased Renting to Russia by China , was operational all year .

The Qin walls ran from Liaodong to Lintao , thus enclosing the conquered Conquering Ordos region .