US History Crossword Puzzle

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Across
  1. 4. the final battle of the American Revolution
  2. 6. project that developed the atomic bomb
  3. 7. muckraker who exposed Standard Oil
  4. 10. 1900s environmental disaster in the Great Plains
  5. 11. act aimed to break up Native American tribal lands
  6. 12. period of fear of communism in the 1920s
  7. 13. the first satellite in space, launched by the USSR
  8. 14. international organization proposed by Woodrow Wilson
  9. 15. doubled the size of the United States in 1803
Down
  1. 1. the scandal that led to President Nixon's resignation
  2. 2. attack that brought the U.S. into World War II
  3. 3. trade agreement between the U.S., Canada, and Mexico signed in 1994
  4. 5. New Deal program for the elderly
  5. 8. president during the Civil War
  6. 9. 1957 crisis over school desegregation in America