influential political pressure group in the United States (1940–41) that opposed aid to the Allies in World War II because it feared direct American military involvement in the conflict. The committee claimed a membership of 800,000 and attracted such leaders as General Robert E. Wood, the aviator Charles A. Lindbergh, and Senator Gerald P. Nye. Though failing in its campaigns to block the Lend-Lease Act, the use of the U.S. Navy for convoys, and the repeal of the Neutrality Act, its public pressure undoubtedly discouraged greater direct military aid to a Great Britain beleaguered by Nazi Germany. After the Japanese attack on Pearl Harbor (Dec. 7, 1941), the committee dissolved and urged its members to support the war effort.