back door to war theory

The "Back Door to War" theory suggests that U.S. President Franklin D. Roosevelt intentionally provoked Japan into attacking Pearl Harbor on December 7, 1941. This was allegedly done to circumvent American public opposition to direct involvement in World War II and force the United States into the conflict to aid Great Britain against Nazi Germany.1

Revisionist historians argue that Roosevelt employed deceptive tactics, such as gradually increasing U.S. involvement through measures like the Lend-Lease Act and economic sanctions against Japan, to stir pro-war sentiments. They contend that by cornering Japan economically, Roosevelt engineered an attack that would unite the nation behind entering the war.12

However, most historians reject this theory, arguing that while Roosevelt was concerned about public opinion and sought to aid the Allies, he did not intentionally provoke the attack or allow the U.S. fleet to be surprised at Pearl Harbor. They suggest that Roosevelt genuinely tried to avoid war with Japan in 1941 and that intelligence failures, rather than deliberate deception, contributed to the lack of preparedness at Pearl Harbor.132