The establishment of the puppet state of Manchuria would not be the end of the adventures of the Japanese in China, and instead they would endeavor over the course of the next decade to extend their influence, and during that expansion they would eventually fall into a full scale war with China. This episode will first look at why the Japanese felt they had to constantly increase the territory under their control, before looking at the Marco Polo Bridge incident, which would ignite the Second Sino-Japanese War.