 Complete the following phrase:  From 1903, Mischchenko was commander of the Trans-Baikal Cossack Brigade. During the Russo-Japanese War of 1904-1905 he commanded a separate East-Baikal Cossack Brigade, which was active in many of the battles of that war. Initially, his forces were in Korea, with instructions to obstruct the landing of the Japanese First Army and its march towards Manchuria. However, after several minor skirmishes, Mischchenko retreated across the Yalu River. He played a minor role on the flanks of the Battle of the Yalu River, and was also part of the Russian defenses at the Battle of Hsimucheng, and 