Last month marked the 80th anniversary of the outbreak of World War Two, which cost the lives of an estimated fifty to sixty million people and was the most terrible war in world history. We all know how the war turned out—with an overwhelming Soviet-Western Allied victory over Nazi Germany ending with the destruction and dismemberment of Germany herself and the death by starvation of millions of her citizens. Given the way the events of the war played out, there was no other foreseeable outcome other than her defeat. But as most historians are aware, German defeat in the war would have been far from inevitable had Nazi leader Adolf Hitler refrained from making certain critical mistakes. This series of articles represents an attempt to summarize the top mistakes and omissions which Germany made that cost them victory in this greatest and most terrible of all wars in human history. Of course, the best way for Germany to have won World War Two was for them to have avoided fighting Britain, France, and the United States of America altogether. Germany had the military potential to defeat France and likely force Britain to make peace, but with a Navy less than one-sixth the size of Britain's, it had no means to even attack U.S. territory, let alone defeat it.