1920 Montana’s population is 548,449 (more than twice the population in 1900)

1920 19th Amendment to the U.S. Constitution gives women the right to vote

1922 Kevin-Sunburst oil field discovered in north-central Montana (Chapter 14)

1924 Montanans pass initiative increasing tax on mines (Chapter 15)

1924 Congress passes the Indian Citizenship Act (Chapter 15)

1928 Montana has 50 paved miles of highway (Chapter 17)

1929 U.S. stock market crashes

1929 Great Depression begins (Chapter 18)