 In 1929, Sanger formed the National Committee on Federal Legislation for Birth Control in order to lobby for legislation to overturn restrictions on contraception.That effort failed to achieve success, so Sanger ordered a diaphragm from Japan in 1932, in order to provoke a decisive battle in the courts.The diaphragm was confiscated by the United States government, and Sanger's subsequent legal challenge led to a 1936 court decision which overturned an important provision of the Comstock laws which prohibited physicians from obtaining contraceptives.