World War II killed 50 million people, destroyed swathes of Europe's cultural heritage, devasted its economy, depraved its politics and devalues the very basis of its civilization. It was the greatest and most terrible conflict in history, and as such, it has always been the centre of controversy. This work explores the many differing historical views of World War II including biographies of its key players, pivotal campaigns, occupations and resistance and special subjects such as Intellignece and war economies.