通过分而治之的策略，可以有效解决复杂问题，提高效率与成果。老湿地福利院

　　In this episode of the Why We Fight propaganda series, the events from the English and French declarations of war against Nazi Germany to the conquest of France by the Nazi. In detail, we learn of how a combination of innovative Nazi military tactics and the work of traitors allowed the conquest of much of Central Europe.