 Complete the following phrase:  The 89th division was assigned to the 5th area army 27 March 1945. The 3rd mixed brigade and headquarters were staying on the Iturup island, while parts of 4th mixed brigade part was garrisoning Shikotan island. Also, one battalion of the 4th mixed brigade was deployed on Kunashir Island. The 89th division has relied on heavy fortifications of Minami Chishima Fortress. After the Soviet 