 Complete the following phrase:  General Ivanov participated in the Russo-Japanese War in 1904, he was appointed to the 1st Manchurian Army. In mid-July 1904, he was appointed commander of the Eastern Detachment, after its commander, Lieutet General Fyodor Keller was killed at the Battle of Motien Pass, and was later appointed to the 3rd Siberian Army Corps, and commanded the corps during retreating from Liaoyang after the 