After the Kankiryo Saddle was secured on 26 January 1944, the Japanese withdrew to Crater Hill. From there, they had good observation of the saddle to the south-west, and they established a strong position. The Australians surrounded the position and over the course of a week reduced the position with patrolling and air attacks, forcing the Japanese defenders to abandon the position on 31 January 1944, and fall back to Paipa. Casualties during the fighting to secure Shaggy Ridge amounted to up to 500 Japanese killed, and 46 killed and 147 wounded for the Australians.