Complex sentence: Furthermore, where he reports that it was MacArthur's intent to allow the Japanese to attempt the overland assault, he identifies the inconsistencies in MacArthur's action when this occurred during the campaign that followed and in the battle at the beachheads after that.
Split into simpler sentences: Furthermore, where he reports that it was MacArthur's intent to allow the Japanese to attempt the overland assault. When this occurred, he identifies the inconsistencies in MacArthur's actions during the campaign that followed and in the battle at the beachheads after that.