The position of affairs was now profoundly altered by the conclusion of the Anglo-Japanese Alliance. This important Treaty gave Japan the strength and the encouragement ultimately to intervene on her own account and endeavor to curb the restless ambitions of Russia. Russia gave a definite pledge that her troops would be withdrawn from Manchuria by instalments on the expiration of a certain period. That period expired on October 8th, 1903, but the pledge was never redeemed. A show of evacuation was made in 1902, but the troops returned, and at the end of October of 1903 Mukden was re-occupied in force. Never during the whole period did Russia lose her grip upon Niuchwang. [Sidenote: Russians in Korea] Notwithstanding the conclusion of the Anglo-Japanese Treaty of Alliance in the beginning of 1902, Japan waited for eighteen months before entering into the diplomatic lists alone against Russia. But at last, in August of 1903, this course was rendered imperative upon her, not only by the failure of the Czar's Government to carry out their engagements in regard to Manchuria, but by their aggressive policy in Korea. M. Pavloff, rebuffed at Masampo in 1900, had turned his energies in another direction. He secured for his countrymen valuable mining rights in Northern Korea, and Russians then began to cross the Yalu River and ultimately occupied Yongampo, a town of some importance on the southern bank. Not content with railway enterprises, they even started to construct fortifications. The Japanese, of course, interposed energetically and succeeded in modifying the Russian activity; but it now became apparent that, unless some binding arrangement could be arrived at, Korea was destined to share the fate of Manchuria. [Sidenote: Japanese Protests]