Topic 9.6: Challenges of the 21st Century
Welcome to one of the most impactful chapters in your APUSH journey! While most of history feels like "the olden days," this topic covers events that have directly shaped the world you live in today. We will focus on how the United States responded to new threats at the start of the new millennium. Don't worry if the political details seem complex—we’re going to break them down into the essential "need-to-know" facts for your exam.
The Turning Point: September 11 Attacks
The 21st century began with a massive shift in American foreign and domestic policy. This shift was triggered by the September 11 attacks (often called 9/11).
What happened?
On September 11, 2001, terrorists launched a coordinated attack against the United States using hijacked commercial airplanes. There were two primary targets named in your syllabus:
• The World Trade Center: Two planes struck the "Twin Towers" in New York City, leading to their collapse.
• The Pentagon: A third plane struck the headquarters of the U.S. Department of Defense in Arlington, Virginia.
Historical Context Tip: Before this, the U.S. had spent the late 20th century celebrating the end of the Cold War (see Topic 9.3). After 9/11, the "enemy" was no longer a single country like the Soviet Union, but rather non-state terrorist networks.
Key Takeaway: The September 11 attacks ended the post-Cold War era of relative security and forced the United States to completely rethink its national security and role in the world.
The Conflict in Afghanistan
Immediately following the 9/11 attacks, the United States launched a military campaign in Afghanistan. This was the first major phase of what became a global effort to combat terrorism.
Why Afghanistan?
The U.S. government identified that the terrorist group responsible for 9/11 was based in Afghanistan and was being protected by the local ruling regime (the Taliban). The goals were to:
1. Capture those responsible for the 9/11 attacks.
2. Remove the regime that provided a "safe haven" for terrorists.
Did you know? This conflict became the longest war in American history, lasting nearly two decades. For your AP exam, remember it as a direct causational effect of the September 11 attacks.
The Conflict in Iraq
In 2003, the United States expanded its focus beyond Afghanistan and began a conflict in Iraq. This was a highly controversial move that sparked intense debate both in the U.S. and around the world.
Why Iraq?
The U.S. government argued that the Iraqi leadership posed a threat to national security. Key concerns included:
• The potential for Iraq to develop or possess weapons of mass destruction.
• The desire to prevent future terrorist attacks by changing the political landscape of the Middle East.
The Result:
While the initial military invasion was swift, the conflict turned into a long-term engagement focused on rebuilding the Iraqi government and dealing with internal instability. This conflict is a prime example of America as a world power attempting to manage global security in a new, unpredictable century.
Quick Review: Comparison of the Two Conflicts
Conflict in Afghanistan: Started in 2001; focused on direct retaliation for the 9/11 attacks and removing terrorist bases.
Conflict in Iraq: Started in 2003; focused on "preemptive" security (stopping a threat before it could happen) and regional stability.
Key Takeaway: Both the Afghanistan and Iraq conflicts represent the "Challenges of the 21st Century" because they involved unconventional warfare, long-term nation-building, and debates over how much power the U.S. should exercise abroad.
Historical Thinking Skill: Causation
When studying Period 9, the AP exam often asks you to explain causation. Here is a simple "Cause and Effect" flow for this chapter:
The Cause: The September 11 attacks on the World Trade Center and the Pentagon.
The Effect: A dramatic shift in U.S. foreign policy leading to the conflicts in Afghanistan and Iraq.
The Long-term Result: Ongoing debates about national security, civil liberties, and the United States' role in maintaining global order.
Common Mistake to Avoid: Don't confuse the end of the Cold War with these conflicts! The Cold War (Topic 9.3) was about communism and the Soviet Union. The 21st-century challenges are about terrorism and Middle Eastern instability. They are two different eras with very different "enemies."
Summary for Study
• Target 1: The World Trade Center (NYC).
• Target 2: The Pentagon (DC).
• War A: Afghanistan (Direct response to 9/11).
• War B: Iraq (Focus on regional security and weapons threats).
• Broad Context: These events define the "War on Terror" era and represent the primary foreign policy challenges of the modern age.
Don't worry if this seems heavy! For the exam, you just need to understand that 9/11 was the "spark" that led to the military engagements in Afghanistan and Iraq, and that these events characterize the current era of American history (Period 9).