20वीं सदी में अमेरिका के लिए एक टाइमलाइन तैयार करें।
1. 1900: The United States emerges as a world power after winning the Spanish-American War.

2. 1914: The United States enters World War I after years of remaining neutral.

3. 1919: The Treaty of Versailles is signed, officially ending World War I.

4. 1920: The 19th amendment is passed, granting women the right to vote.

5. 1929: The stock market crashes, leading to the Great Depression.

6. 1939: World War II begins with the invasion of Poland by Nazi Germany.

7. 1941: The United States enters World War II after the Japanese attack on Pearl Harbor.

8. 1945: World War II ends with the United States dropping atomic bombs on Hiroshima and Nagasaki, Japan.

9. 1947: The Marshall Plan is implemented to rebuild Europe after World War II.

10. 1950: The Korean War begins as North Korean forces invade South Korea.

11. 1954: The Supreme Court declares segregation in public schools unconstitutional in Brown v. Board of Education.

12. 1960: The Civil Rights movement gains momentum with the sit-ins at Woolworth’s and the election of John F. Kennedy as president.

13. 1963: Martin Luther King Jr. delivers his famous “I Have a Dream” speech at the March on Washington.

14. 1964: The Civil Rights Act is signed into law by President Lyndon B. Johnson.

15. 1969: American astronaut Neil Armstrong becomes the first person to walk on the moon.

16. 1973: The Vietnam War ends with the Paris Peace Accords.

17. 1974: President Richard Nixon resigns in the aftermath of the Watergate scandal.

18. 1980: Ronald Reagan is elected president, beginning a conservative era in American politics.

19. 1991: The Gulf War is fought against Iraq after the invasion of Kuwait.

20. 1999: The United States experiences the worst terrorist attack in its history with the 9/11 attacks.