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Ch 8: The United States in the 20th Century

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Get a comprehensive overview of the United States in the 20th century by reviewing fun lessons you can access 24/7. Use the short quizzes and practice exam in this chapter to assess your knowledge as you prepare for a quiz, assignment or class discussion on the subject.

The United States in the 20th Century - Chapter Summary

Examine this chapter's engaging lessons to ensure you have a quality understanding of the United States in the 20th century. Topics covered include Prohibition in the 1920s, the Great Depression, the Vietnam War and September 11th. Review the lessons at your leisure. In no time, you will be prepared to:

  • Share details about America's official position and involvement in World War I
  • Discuss American politics and Prohibition in the 1920s
  • Understand the timeline and causes of the Great Depression and Roosevelt's New Deal
  • Describe the U.S. during World War II and post-war American life
  • Provide details about the Cold War and America's involvement in the Korean War
  • Detail the causes and effects of the Vietnam War and Gulf War
  • Exhibit an understanding of September 11th and the War on Terror
  • List ways science and technology have advanced since 1945

Lessons make it easy to strengthen your comprehension of the United States in the 20th century. Watch fun videos that average about 8 minutes each, or read full transcripts you can print or review from your computer or mobile device. Gain additional details about lesson topics by submitting questions to our experts. Take short quizzes and a practice exam to gauge your understanding of concepts covered in this chapter.

14 Lessons in Chapter 8: The United States in the 20th Century
Test your knowledge with a 30-question chapter practice test
The United States in World War I: Official Position, Isolation & Intervention

1. The United States in World War I: Official Position, Isolation & Intervention

The United States' best option was to stay out of World War I. They had nothing to gain from getting involved. So, they tried to stay neutral, but as American interests started to lean toward the Allied Powers, many events happened to give the States the final push to enter the war.

American Involvement in World War I: How the War Changed After America's Entry

2. American Involvement in World War I: How the War Changed After America's Entry

As much as the U.S. wanted to stay neutral during World War I, it proved impossible. This meant the U.S. had to raise the forces and money to wage war. Find out how Americans played their part in WWI in this lesson.

American Politics in the 1920s: Transition, Corruption & the Teapot Dome Scandal

3. American Politics in the 1920s: Transition, Corruption & the Teapot Dome Scandal

Americans looked forward to the start of a new decade in 1920. They also looked for a president that would ease their fears and return the nation to 'normal,' but big business and corruption would come to symbolize politics of the decade.

Prohibition of the 1920s: Definition, 18th Amendment & Results

4. Prohibition of the 1920s: Definition, 18th Amendment & Results

The 18th Amendment outlawed all alcohol in the United States. The prohibition era defined a decade and the people of a modernizing America. In this lesson, develop an understanding of prohibition and the 18th Amendment.

The Great Depression: Timeline, Causes & Impact

5. The Great Depression: Timeline, Causes & Impact

In this lesson, we explore the Great Depression and the economic trends and practices that caused the greatest economic meltdown in the history of the world.

Franklin D. Roosevelt's New Deal

6. Franklin D. Roosevelt's New Deal

In this lesson, you will explore the government programs collectively called the New Deal as the nation attempted to recover from economic crisis following the Great Depression.

The United States During WWII: The Home Front

7. The United States During WWII: The Home Front

When the United States entered World War II in December 1941, life changed almost overnight for those on the battle front and on the home front. Learn about the war's dramatic and lasting effects on American government, economy and society.

Post-War American Life: Culture of the late 1940s & 1950s

8. Post-War American Life: Culture of the late 1940s & 1950s

In this lesson, we will explore American postwar culture. We will learn what life was like throughout the late 1940s and the 1950s by highlighting important cultural trends.

The Cold War in America: Effects on Everyday Life

9. The Cold War in America: Effects on Everyday Life

Fear of communism and nuclear annihilation spread throughout the United States during the Cold War. Learn about the effects of the Cold War on everyday life and the determination of Americans to prepare for and combat the communist menace.

United States Involvement in the Korean War: Causes and Effects

10. United States Involvement in the Korean War: Causes and Effects

The Korean War was a short but bloody war with more than five million casualties. Find out what caused this deadly and destructive war, how the United States came to be involved and how the war affected Korea and its allies.

The Vietnam War: Causes, Conflicts & Effects

11. The Vietnam War: Causes, Conflicts & Effects

The Vietnam War was the longest and most polarizing conflict in the history of the United States. Learn about the causes of the war as well as its effects on the United States.

Causes, Events & Political Figures of the Gulf War

12. Causes, Events & Political Figures of the Gulf War

The Gulf War occurred in 1990 and 1991 when Iraq invaded Kuwait. UN, NATO, and United States forces responded by attacking and pushing Iraqi troops out of Kuwait. The war was a decisive victory for American and coalition forces.

September 11th & the War on Terror

13. September 11th & the War on Terror

September 11, 2001 was a day of terrorist attacks by radical Islamists against the United States. In New York, Virginia, and Pennsylvania, nearly 3,000 people were killed. As a result, the United States launched a War on Terror that has lasted over a decade since.

The Advance of Science & Technology Since 1945: Developments & Impact

14. The Advance of Science & Technology Since 1945: Developments & Impact

In this lesson, we explore just a few of the numerous advances and innovations made in the worlds of sciences and technology, from automobiles and televisions to computers and phones that can fit in the palm of your hand.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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