Complex sentence: Further amphibious landings by the 25th Indian Infantry Division and the overland advance of the 82nd (West Africa) Division made the Japanese position in the Arakan untenable and they ordered a general withdrawal to avoid the complete destruction of the Twenty-Eighth Japanese Army.
Split into simpler sentences: Further amphibious landings by the 25th Indian Infantry Division and the overland advance of the 82nd (West Africa) Division made the Japanese position in the Arakan untenable. A general withdrawal was ordered to avoid the complete destruction of the Twenty-Eighth Japanese Army.