The Russo–Japanese War (February 10, 1904 – September 5, 1905) was a conflict that grew out of the rival imperial ambitions of the Russian Empire and Japanese Empire over Manchuria and Korea. The major theatres of operations were Southern Manchuria, specifically the area around the Liaodong Peninsula and Mukden, the seas around Korea, Japan, and the Yellow Sea.
The Russians sought a warm water port on the Pacific Ocean, for their navy as well as for maritime trade. Vladivostok was only operational during the summer season, but Port Arthur would be operational all year. From the end of the First Sino-Japanese War and 1903, negotiations between Russia and Japan had proved futile. Japan chose war to maintain exclusive dominance in Korea.
The resulting campaigns, in which the fledgling Japanese military consistently attained victory over the Russian forces arrayed against them, were unexpected by world observers. These victories, as time transpired, would dramatically transform the balance of power in East Asia, resulting in a reassessment of Japan's recent entry onto the world stage. The embarrassing string of defeats inflamed the Russian people's dissatisfaction with their inefficient and corrupt Tsarist government, and proved a major cause of the Russian Revolution of 1905.
- ↑ Forczyk p. 22 "Tsar's diary entry"