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Ch 13: American Conflicts & Wars in the 21st Century

About This Chapter

Take a look at these bite-sized history lessons to review 21st-century American conflicts and wars. You can use this chapter to study for history exams, catch up in a class or simply learn more about recent U.S. wars/conflicts.

American Conflicts & Wars in the 21st Century - Chapter Summary

This comprehensive American history chapter discusses several U.S. conflicts and wars during the 21st century. Work through the chapter at your own pace to review the history of the 9/11 attacks, the War on Terror, the Iraq War, the War in Afghanistan, nuclear weapon proliferation and more. The chapter comes with short quizzes that go over important terms and concepts from the lessons. You can also access this chapter online at any time that fits your schedule. When you're finished, you should be able to:

  • Discuss George W. Bush's reaction to the the 9/11 terrorist attacks
  • Evaluate the September 11th attacks, the War on Terror, the Iraq War and the War in Afghanistan
  • Tell how American society and politics was impacted by the wars in Iraq and Afghanistan
  • Explain the War on Terror's use of torture
  • Describe America's deterrence of nuclear weapon proliferation
  • Evaluate the development of American warfare during the 21st century

8 Lessons in Chapter 13: American Conflicts & Wars in the 21st Century
Test your knowledge with a 30-question chapter practice test
George W. Bush: the 9/11 Terrorist Attack & War on Terror

1. George W. Bush: the 9/11 Terrorist Attack & War on Terror

The September 11, 2001 attacks on the United States forced President George W. Bush to reappraise his foreign policy. Learn about the tragic day, the Bush Doctrine and the ensuing wars in Iraq and Afghanistan.

September 11th & the War on Terror

2. 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 War in Afghanistan: Causes, Timeline & Controversy

3. The War in Afghanistan: Causes, Timeline & Controversy

The War in Afghanistan began in 2001 after the September 11 attacks. United States and NATO coalition forces attacked Taliban and Al Qaeda forces. As of 2014, United States personnel are withdrawing from the country, ending over a decade of fighting.

Understanding the Iraq War

4. Understanding the Iraq War

The Iraq War lasted from 2003-2011. Thousands of American and Coalition forces died during the conflict, as well as many thousands of Iraqis. The American decision to go to war in Iraq remains controversial today.

Impact of the Wars in Afghanistan & Iraq on American Society & Politics

5. Impact of the Wars in Afghanistan & Iraq on American Society & Politics

In this lesson we explore public opinion surrounding the 21st-century wars in Iraq and Afghanistan. We also discuss why and how it changed, and how that change in public opinion helped lead to an electoral victory.

History of Using Torture in the War on Terror

6. History of Using Torture in the War on Terror

The world thought it had agreed that torture was unequivocally wrong. Then 9/11 happened. In this lesson, we'll see how the War on Terror reintroduced this debate and how torture impacted the fight against terrorism.

American Deterrence of Nuclear Weapon Proliferation

7. American Deterrence of Nuclear Weapon Proliferation

Nuclear threats are nothing to sneeze at, and this hasn't changed since the end of the Cold War. In this lesson, we'll see how the world has tried to prevent nuclear war, by stopping the spread of nuclear weapons, and see if it's working.

America & Warfare in the 21st Century: Development & Actors

8. America & Warfare in the 21st Century: Development & Actors

In this lesson we explore some of the trends that affect warfare in the 21st century. From smaller armies to big leaps in technology to the use of the internet, war looks markedly different than it did even a generation ago.

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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