Complex sentence: Further actions were fought at Templeton's Crossing and around Oivi and Gorari before the Japanese withdrew across the Kumusi River to their beachheads around Buna and Gona, which was the scene of heavy fighting in late 1942 and early 1943.
Split into simpler sentences: Further actions were fought at Templeton's Crossing and around Oivi and Gorari. The Japanese withdrew across the Kumusi River to their beachheads around Buna and Gona, which was the scene of heavy fighting in late 1942 and early 1943.