Defendants in the dock at the Nuremberg trials. The main target of the prosecution was
Hermann Göring.
Theodore Roosevelt was known as the "trust buster". He broke up many monopolies such as railroads in the Northwest. He used the Sherman Anti-trust Act, but it was not terribly effective. Some of the big trust broken up were the American Tobacco company, Standard oil, and AT & T
The oil embargo of 1973 forced the U.S. to ration gasoline for a time.