 Complete the following phrase:  During the Russo-Japanese War, under the command of Lieutet General Tsuchiya Mitsuharu, this division was assigned to General Nogis 3rd Army, and thus saw considerable combat and casualties at the bloody Siege of Port Arthur. It subsequently formed the core of General Kawamura Kageakis 5th Army, where under the command of Lieutet General Samejima Shigeo, it played a significant role in securing the Japanese victory at the 