A much higher proportion of people favoured stern action against the Japanese, a policy most conspicuously manifested in the July 1941 freeze on Japanese assets and embargo on all exports, which was decisive in committing Tokyo to fight, since 80 percent of its oil supplies came from the United States and the Dutch East Indies. The embargo was far more popular at home than Roosevelt’s escalation of the U.S. Navy’s role in the Battle of the Atlantic
