Wall Street and the Rise of Hitler by Anthony C. Sutton:
‘The contribution made by American capitalism to German war preparations can only be described as phenomenal. It was certainly crucial to German military capabilities... Not only was an influential sector of American business aware of the nature of Naziism, but for its own purposes aided Naziism wherever possible (and profitable) - with full knowledge that the probable outcome would be war involving Europe and the United States.’ Penetrating a cloak of falsehood, deception and duplicity, Professor Antony C. Sutton reveals one of the most remarkable but unreported facts of the Second World War: that key Wall Street banks and American businesses supported Hitler’s rise to power by financing and trading with Nazi Germany. Carefully tracing this closely guarded secret through original documents and eyewitness accounts, Sutton comes to the unsavoury conclusion that the catastrophic Second World War was extremely profitable for a select group of financial insiders. He presents a thoroughly documented account of the role played by J.P. Morgan, T.W. Lamont, the Rockefeller interests, General Electric Company, Standard Oil, National City Bank, Chase and Manhattan banks, Kuhn, Loeb and Company, General Motors, the Ford Motor Company, and scores of others in helping to prepare the bloodiest, most destructive war in history.
I have posted this documentary already. But now I want to specify something in particular. At minute 27:10 the author describes the attempted coup to overthrow the US government. https://www.youtube.com/watch?v=fk9O9R7hzn8
But Smedley Butler https://en.wikipedia.org/wiki/Smedley_Butler didn't go along. Here is an excerpt of the speech he gave about the offer he received about directing the coup d'etat. https://www.youtube.com/watch?v=2pSOekHA8OQ
Butler wrote also a book on the topic, titled "War is a racket"! https://en.wikipedia.org/wiki/War_Is_a_Racket