Lin adds that another reason Japan offered for fighting China was to "resist communism." "A martial tune of the day extolled 'acting on Heaven's behalf to strike down the unrighteous,'" with the latter term referring to communists.
日本打中國，一方面也是『防共』」，林衡道說，「『代天打不義』，當時教唱的軍歌如是說。」