During 1940 the determined efforts of President Franklin Roosevelt to involve America in the war against Hitler's Germany were blocked by the overwhelming opposition of the American people, running at 80% according to some polls. A group of young Yale Law School peace activists had launched the America First Committee and it quickly attracted 800,000 members, becoming the largest grassroots political organization in our national history. The leadership of the AFC included many of our most prominent business and journalistic figures, and famed aviator Charles Lindbergh, one of our greatest national heroes, served as its top spokesman.

With American antiwar sentiment so seemingly strong and resolute, various political stratagems were employed to reduce it. In late October 1941, just few weeks before the attack on Pearl Harbor finally settled the issue, FDR announced in a nationwide radio broadcast that he had obtained a German map that revealed the secret Nazi plans to seize control of Latin America, which Hitler would then use as a base to attack the United States as part of his bold plan of world conquest.

Our President declared:

Hitler has often protested that his plans for conquest do not extend across the Atlantic Ocean. I have in my possession a secret map, made in Germany by Hitler's government – by the planners of the new world order. It is a map of South America and a part of Central America as Hitler proposes to reorganize it…This map makes clear the Nazi design, not only against South America but against the United States as well.

Probably millions or even tens of millions of Americans believed FDR's words about that direct threat to our national security and therefore softened their resistance to our country's involvement in the European war. But as historians have long since acknowledged, the map was a forgery, probably produced by FDR's own close British collaborators. In an earlier private conversation with the British ambassador, FDR had warned that his secret activities with the British would probably lead to his impeachment if they were revealed.