Complex sentence: Following Japan's entry into the war in December 1941 the decision was made to bring the 6th Division back to bolster the Allied defences in the Pacific, and the 2/3rd Battalion left the Middle East on 10 March 1942, aboard the steamer "Otrango".
Split into simpler sentences: Following Japan's entry into the war in December 1941 the decision was made to bring the 6th Division back to bolster the Allied defences in the Pacific. Consequently, the 2/3rd Battalion left the Middle East on 10 March 1942, aboard the steamer "Otrango".