Subjects

Subjects

More

World War II

Learn with content from all year groups and subjects, created by the best students.

World War II: AP European History Study Guide



Introduction

Welcome, intrepid historians and aspiring Avengers of the past! Prepare to embark on a wild ride through World War II, a global conflict that makes "Game of Thrones" look like a mild family disagreement. 🛡️🗡️ Let's dig into the details of the war that reshaped the world and set the stage for the modern era.



Causes of World War II

World War I might have ended with the Treaty of Versailles in 1919, but peace was as fragile as a soap bubble. This treaty slapped Germany with hefty reparations and economic sanctions, leaving its people in financial ruin and desperate for change—any change, even if it came with a side of dictatorship.

The Weimar Republic: If the Weimar Republic were a person, it would be that one friend who can't catch a break. Forced into democracy after being a monarchy, it struggled under the weight of the Treaty of Versailles and lack of popular support. The German public, still salty about Kaiser Wilhelm II's surrender to the Allied Powers on November 11, 1918 (Armistice Day), saw the Weimar leaders as weak. Enter the authoritarian leaders with their silver tongues and dazzling promises of national greatness, and it wasn't long before the democratic experiment crumbled like a stale cookie.

Violations of the Treaty of Versailles: Adolf Hitler wasn’t one for rules. He violated the Treaty of Versailles by annexing Austria and Czechoslovakia and remilitarizing the Rhineland. Britain and France, not wanting to start another global brouhaha, turned a blind eye to these shenanigans. But the final straw was the German and Soviet invasion of Poland in September 1939. Poland was supposed to be under the protective "umbrella" of the Treaty of Versailles, but the League of Nations was more like a paper umbrella in a rainstorm—completely ineffective.



The European Theatre

So, about that invasion: Germany went all out, and just 16 days later, the Soviet Union decided to join the party. Both nations were keen on reclaiming territory they’d lost under the Treaty of Versailles. Great Britain and France declared war on Germany but curiously not on the Soviet Union, perhaps thinking they'd need the Soviet's help later to deal with Uncle Adolf.

Military Methods: World War II saw technological upgrades that made every previous battle seem like a quaint melee in comparison:

  • Vehicles, new ships, and aircraft took battles to new terrains and heights.
  • Communication technology improved, making it easier to coordinate attacks.
  • Guided missiles and ballistic missiles increased precision in strikes.
  • Advances in medicine and surgical techniques saved countless lives.
  • Atomic weapons changed the game with their devastating power.
  • Blitzkrieg, or “lightning warfare,” helped Germany expand rapidly into Allied territories.

The European Theatre featured key moments like the Allied Invasion of Italy in 1943, with the US and allies launching a spectacular attack on Rome from their base in Sicily. Poor Mussolini, imprisoned and forced to resign, might have wondered if he should've stayed a teacher.

The big game-changer was the D-Day invasion on June 6, 1944, where the Allies stormed the beaches of Normandy. This monumental event marked the beginning of the end for Nazi Germany. Soon after, Paris was liberated, and the Allies pushed into Belgium. By April 1945, with all signs pointing to the inevitable defeat of the Axis powers, Hitler decided to make his exit, stage left.

In the Eastern Front, it was all about the not-so-friendly neighborhood of Stalingrad. The Soviet Union, driven by sheer numbers and stubborn resolve, thwarted the German advance. The Battle of Stalingrad became the Eastern Theatre's turning point.



Middle Eastern / African Theatre

Italy had grand ambitions to resurrect the glory of the Roman Empire under a fascist banner. Germany lent a helping hand, and the dynamic duo began their grand tour, invading Greece, Yugoslavia, and North Africa. Luckily for the Allies, the Axis forces met fierce resistance and were eventually ousted.

By 1944, fighting a multi-front war was stretching the Axis powers thin. With forces divided and supply lines strained, Germany began losing ground. After the successful Allied invasion of Italy, North Africa and the Middle East slipped from Axis control like soap in a shower.



Pacific Theatre

Meanwhile, the Pacific Theatre was like a summer blockbuster full of dramatic twists and explosive action sequences. The Meiji Restoration of 1868 had pulled Japan out of isolation. To fuel its ambitious modernization, Japan sought resources through imperial expansion, lining its pockets via invasions into Manchuria, China, and Korea.

Japan's invasion of Manchuria in 1931 drew the ire of the U.S. and the League of Nations. When Japan committed atrocities like the Nanjing Massacre and flouted the Open Door Policy, the U.S. imposed economic sanctions. Undeterred, Japan bombed Pearl Harbor on December 7, 1941, prompting a direct military response from the United States.

Island Hopping Strategy: The U.S. essentially pulled off the ultimate travel itinerary by hopping from island to island in the Pacific, aiming to curb Japan's ambitions. The Battle of Midway (June 1942) was a pivotal naval clash that tilted the balance in favor of the Allies.

The theatre's climax came with the U.S. using atomic bombs on Hiroshima and Nagasaki in August 1945. These bombings brought unparalleled destruction and compelled Japan to surrender in the days that followed.



Key Terms to Know

  • Adolf Hitler: Infamous Führer of Nazi Germany, known for his brutal regime and catastrophic decisions.
  • Blitzkrieg: Germany's fast-paced, overwhelming military strategy.
  • D-Day Invasion: The definitive Allied assault on Normandy, crucial in liberating Nazi-occupied France.
  • Five Year Plans: Ambitious Soviet plans for rapid industrialization and collectivization, often resulting in hardship.
  • Island Hopping: The Allies' strategic method in the Pacific Theatre to target specific islands.


Fun Fact

"Blitzkrieg might sound like a type of German sausage, but it's actually a rapid, devastating attack strategy that left many enemies feeling like they got struck by lightning."



Conclusion

World War II wasn’t just a clash of armies but a transformative struggle that redefined borders, ideologies, and technology. Battles spanned continents, and chain reactions of alliances and enmities shaped the modern world. So gear up with this knowledge, channel your inner WWII strategist, and ace that AP European History exam! 💪📚

Knowunity is the # 1 ranked education app in five European countries

Knowunity was a featured story by Apple and has consistently topped the app store charts within the education category in Germany, Italy, Poland, Switzerland and United Kingdom. Join Knowunity today and help millions of students around the world.

Ranked #1 Education App

Download in

Google Play

Download in

App Store

Knowunity is the # 1 ranked education app in five European countries

4.9+

Average App Rating

13 M

Students use Knowunity

#1

In Education App Charts in 12 Countries

950 K+

Students uploaded study notes

Still not sure? Look at what your fellow peers are saying...

iOS User

I love this app so much [...] I recommend Knowunity to everyone!!! I went from a C to an A with it :D

Stefan S, iOS User

The application is very simple and well designed. So far I have found what I was looking for :D

SuSSan, iOS User

Love this App ❤️, I use it basically all the time whenever I'm studying

Can't find what you're looking for? Explore other subjects.