Complex sentence: An order to assume defensive operations and to withdraw towards Kokoda was eventually given to Horii on 8 September, as the situation on Guadalcanal worsened for the Japanese and further resources and manpower were diverted to that effort instead.
Split into simpler sentences: An order to assume defensive operations and to withdraw towards Kokoda was eventually given to Horii on 8 September. The situation on Guadalcanal worsened for the Japanese and further resources and manpower were diverted to that effort instead.