Twice, in 1896 and 1898, Russia and Japan signed agreements reaffirming Korea’s independence and promising anew to withdraw their forces. These pacts were promptly violated by both contestants for power, but Japan prepared more realistically for the forthcoming struggle. On a February night in 1904, without the formality of a declaration of war, a Japanese squadron attacked the Russian warships anchored at Port Arthur. This surprise blow was followed shortly by the landing of Japanese troops at Chemulpo. They advanced to the frontier and defeated the Russians in the battle of the Yalu--a victory that has been compared with the battle of Valmy in the French Revolution as a landmark of history. Certainly the West was made aware that an Oriental nation had risen to the stature of a world power for the first time in modern history. The value of Korea as a strategic springboard was demonstrated when Japanese land and sea forces isolated the fortresses on the Liaotung Peninsula. Port Arthur fell after a bloody siege of 6 months. Next, the Japanese invaders of Manchuria defeated an army of 350,000 Russians and inflicted 150,000 casualties in the four-week battle of Mukden. This was the decisive clash on land; and in the one-sided naval battle of Tsushima, Admiral Togo annihilated the Baltic fleet which the Czar had ordered on the long voyage to the Pacific. The end came abruptly in the summer of 1905. In the Treaty of Portsmouth, signed on 5 September, Russia ceded the southern part of Sakhalin Island to the victors while recognizing their “paramount” interests in Korea. All rights in the Liaotung Peninsula went to Japan as well as important concessions in Manchuria. Not much was left to Russia in the Far East except a precarious foothold in northern Manchuria. _Korea as a Japanese Colony_ For 5 years Japan kept up a pretense of a protectorate in Korea. Then, in 1910, came outright annexation. Europe’s “balanced antagonisms” soon flared up in World War I, leaving Japan free to exploit Korea as a colony. Western observers might have noted such evidences of modernization as new docks, railroads, factories and highways. But they were administered by Japanese overseers as Koreans sank to the level of coolies without a voice in the government. Although Japan joined the fight against the Central Powers in World War I, her military efforts were made against allies as well as enemies. Using Korea as a beachhead, she attempted to enlarge her empire on the Asiatic mainland at the expense of Russia, then in the throes of revolution. Three years after the Armistice, a Japanese army still occupied the Vladivostok area; but the United States took such a firm diplomatic stand that Tokyo backed down.