Complex sentence: Only after unification would it be possible for the Kuomintang to mobilize a war against Japan, so he would rather ignore the discontent and anger within the Chinese people at his policy of compromise with the Japanese, and urged Zhang and Yang to carry out suppression efficiently.
Split into simpler sentences: Only after unification would it be possible for the Kuomintang to mobilize a war against Japan. So he would rather ignore the discontent and anger within the Chinese people at his policy of compromise with the Japanese, and urged Zhang and Yang to carry out suppression efficiently.