The movie then takes the viewer through a series of events that led to the outbreak of the war. We see the Japanese government's decision to expand its empire through conquest and the U.S.'s refusal to recognize Japan's conquest of China. We see the U.S. placing an embargo on Japan to prevent it from acquiring the oil and resources it needed to continue its military expansion, and Japan's response by launching a surprise attack on Pearl Harbor on December 7, 1941.

Throughout the movie, we are given a glimpse into the minds of the leaders of both nations. We see how President Roosevelt's policies were shaped by his belief that an aggressive Japan would eventually threaten the security of the United States. We are also given insight into the motivations of the Japanese leaders who were seeking to establish a "new order" in East Asia.

The movie provides a rich historical context to the events that led to the entry of the United States into World War II. It explores the complex relationships between nations and the competing interests that drive their actions. We see how the United States struggled to maintain its neutrality, and how Japan was driven by a sense of resentment towards the U.S. and the West.

The documentary also includes interviews with experts in the field of history and military strategy. They provide additional insight into the events of the time as well as offer their own analysis of what led to the outbreak of war.

Overall, World War II: 1940-1941 Part Three: America & Japan is a compelling documentary that explores a critical period in world history. It provides a fresh perspective on the events leading up to the war, and sheds light on the complex relationships between nations during a time of global conflict.