The Holocaust and World War II
Grade 10 · Social Studies · Study Guide
An examination of World War II's causes, major events, and the Holocaust — history's most systematic genocide.
World War II (1939–1945) was the deadliest conflict in human history, killing an estimated 70–85 million people. It emerged from the unresolved tensions of World War I, the punishing Treaty of Versailles, the Great Depression's economic chaos, and the rise of fascist and militarist governments in Germany, Italy, and Japan. Adolf Hitler and the Nazi Party rose to power in Germany in 1933 by exploiting economic desperation and nationalist resentment, promising national restoration while scapegoating Jewish people and other minorities.
The Holocaust was the systematic, state-sponsored persecution and murder of six million Jews, along with millions of Roma, disabled people, political opponents, LGBTQ+ individuals, and others. The Nazi regime used propaganda, discriminatory laws (the Nuremberg Laws, 1935), forced labor camps, ghettos, and ultimately death camps — including Auschwitz-Birkenau — to carry out genocide on an industrial scale. This was not spontaneous violence but bureaucratic mass murder organized by a modern state.
The war itself unfolded in two main theaters. In Europe, Germany invaded Poland in 1939, triggering declarations of war from Britain and France. By 1941, Nazi forces had occupied most of Europe. The tide turned after the Soviet Union repelled the German invasion and after the United States entered following Japan's attack on Pearl Harbor (December 7, 1941). Allied forces invaded Normandy on D-Day (June 6, 1944), and Germany surrendered in May 1945. In the Pacific, the U.S. dropped atomic bombs on Hiroshima and Nagasaki in August 1945, and Japan surrendered, ending the war. The aftermath saw the Nuremberg Trials establish accountability for war crimes and crimes against humanity, and the founding of the United Nations to prevent future global conflicts.
| Event | Date | Significance |
|---|---|---|
| Germany invades Poland | Sept 1, 1939 | Triggers WWII declarations from Britain and France |
| Battle of Britain | 1940 | RAF defeats Luftwaffe; Britain survives Blitz |
| Operation Barbarossa | June 1941 | Germany invades USSR; opens massive Eastern Front |
| Pearl Harbor / U.S. enters war | Dec 7, 1941 | U.S. joins Allies; war becomes truly global |
| Battle of Stalingrad | 1942–43 | Decisive Soviet victory; German advance halted |
| D-Day / Normandy invasion | June 6, 1944 | Allied Western Front opens; Germany trapped |
| V-E Day (Germany surrenders) | May 8, 1945 | War ends in Europe |
| Atomic bombs / V-J Day | Aug 1945 | Japan surrenders; war ends globally |
Key terms
- Holocaust
- The systematic, state-sponsored murder of six million Jews and millions of others by the Nazi regime during World War II.
- Genocide
- The deliberate, organized killing of a large group of people based on ethnicity, religion, or nationality.
- Nuremberg Laws
- 1935 Nazi laws stripping German Jews of citizenship and forbidding marriage between Jews and non-Jews.
- D-Day (June 6, 1944)
- The Allied invasion of Normandy, France — the largest seaborne invasion in history — that opened a Western Front against Nazi Germany.
- Nuremberg Trials
- Post-war international tribunal that prosecuted Nazi leaders for war crimes and crimes against humanity, establishing legal precedents for international justice.
- Fascism
- An authoritarian, ultranationalist ideology that glorifies the state, suppresses opposition, and often promotes ethnic superiority.
Flashcards
- Holocaust
- Nazi Germany's systematic murder of six million Jews and millions of others between 1941–1945.
- Adolf Hitler
- Leader of Nazi Germany (1933–1945); his ideology of ultranationalism and antisemitism drove Germany into war and genocide.
- D-Day
- June 6, 1944 Allied invasion of Normandy; largest seaborne assault in history, opening the Western Front.
- Auschwitz-Birkenau
- Nazi Germany's largest death camp in occupied Poland; over one million people, mostly Jews, were murdered there.
- Nuremberg Trials
- 1945–46 international tribunal prosecuting Nazi leaders for war crimes and crimes against humanity.
- United Nations
- International organization founded in 1945 after WWII to maintain peace, promote cooperation, and prevent future world wars.
Practice questions
What event marked the official start of World War II in Europe?
- Germany's invasion of France
- The bombing of Pearl Harbor
- Germany's invasion of Poland
- Italy's invasion of Ethiopia
Show answer
Answer: Germany's invasion of Poland
On September 1, 1939, Germany invaded Poland. Britain and France declared war on Germany two days later, formally starting WWII in Europe.
The Nuremberg Laws of 1935 expanded the rights of Jewish citizens in Germany.
Show answer
Answer: False
The Nuremberg Laws stripped German Jews of citizenship, banned intermarriage, and excluded them from public life — the legal foundation of persecution.
The Allied invasion of Normandy on June 6, 1944, is commonly known as ___.
Show answer
Answer: D-Day
Operation Overlord's D-Day landings were the largest amphibious military operation in history; 156,000 Allied troops crossed the English Channel.
The Holocaust resulted in the murder of approximately how many Jewish people?
- One million
- Three million
- Six million
- Ten million
Show answer
Answer: Six million
The Holocaust killed approximately six million Jews — two-thirds of European Jewry — along with millions of others targeted by the Nazi regime.
The Nuremberg Trials after WWII established legal precedents for holding individuals accountable for crimes against humanity.
Show answer
Answer: True
The Nuremberg Trials established that individuals can be held criminally liable for crimes against humanity, regardless of following government orders — foundational to international humanitarian law.
Fun facts
- The Soviet Union suffered the most casualties of any nation in WWII — an estimated 27 million deaths, including civilians.
- Oskar Schindler, a German industrialist, saved approximately 1,200 Jewish workers by employing them in his factory.
- The Nuremberg Trials were the first international tribunals to hold individuals criminally responsible for war crimes, creating the foundation of modern international law.
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