Complex sentence: At the end of World War II, the Imperial Japanese Army buried some of their chemical weapons in China, but most were confiscated by Soviet Red Army, the People's Liberation Army and the Kuomintang Army, along with other weapons.
Split into simpler sentences: At the end of World War II, some of chemical weapons in China were buried by the Imperial Japanese Army. But most Japanese chemical weapons were confiscated by Soviet Red Army, the People's Liberation Army and the Kuomintang Army along with other weapons.