National Committee of Americans of Polish Extraction

National Committee of Americans of Polish Extraction, (Polish: Komitet Narodowy Amerykanów Polskiego Pochodzenia or KNAPP)also known as the National Committee of Americans of Polish Descent or its Polish abbreviation KNAPP , was a Polish-American organization active in the years 1942-1959 in the United States.

KNAPP was created in 1942 by Polish activists in the United States to lobby for Poland's independence during World War II. The organization viewed Stalin as a threat to Poland, and campaigned against British and American politicians as they made concessions giving Poland to the Soviet Union. Many Polish Americans joined the cause of the KNAPP and other Polonia organizations during World War II; the group's membership and public visibility peaked in 1944. In 1944, KNAPP started a nationwide Polish American Congress to assemble Polish American leaders for an annual meeting in Buffalo, New York.

Following the Yalta Agreement, KNAPP issued messages to its supporters in outrage that the Allies had not honored Poland's pre-war borders and effectively handed Poland to the USSR. The organization continued in the postwar years lobbying American politicians to raise awareness of atrocities committed against Poles in the Soviet Union.

The National Committee of Americans of Polish Extraction (NCAPE) was created on June 20–21, 1942 on the initiative of several Piłsudskiites, followers of the late Marshal Józef Piłsudski. Individuals associated with the Committee accused the Polish government-in-exile of compromising policies toward the Soviet Union and naiveté toward the attitude of the Western Allies regarding the Polish question.

The NCAPE aimed to defend Polish interests, especially the independence and territorial integrity of the prewar Republic, as well as to lobby for the implementing of the Atlantic Charter and the conditions of the Polish-British Alliance of August 28, 1939. The activists of the Committee thought that Poland's right to an independent existence were threatened not only directly by the occupants, Nazi Germany and the Soviet Union, but also indirectly by the irresponsible and cynical diplomatic games of Great Britain and the United States. In their opinion, these Western powers were willing to pay any price to preserve their alliance with Stalin, which they thought fundamental to defeating the Third Reich.