History

🇯🇵 Japan: 1910: Annexed Korea. 1914–18: Joined WWI, seized German territories in Shandong (China) and the Pacific. 1931: Occupied Manchuria, established Manchukuo. 1937: Launched full-scale Sino–Japanese War. 1941: Pearl Harbor → war with the U.S. and Allies. 1945: Defeated, surrendered after atomic bombings.

🇷🇺 Soviet Union: 1917: October Revolution, Tsar overthrown. 1918–22: Civil war (Reds vs. Whites) → Reds victorious, USSR founded (1922). 1924: Stalin rose to power after Lenin’s death. 1930s: Industrialization, Great Purge. 1939: Signed Molotov–Ribbentrop Pact, co-invaded Poland. 1941–45: Great Patriotic War → defeated Nazi Germany. 1949: Emerged as Europe’s top military power.

🇺🇸 United States: 1917: Entered WWI, helped secure victory. 1920s: Economic boom (Roaring Twenties). 1929: Great Depression, global impact. 1941: Pearl Harbor → full-scale WWII participation. 1944–45: Led liberation of Western Europe, dropped atomic bombs on Japan. 1949: Became one of the two superpowers.

🇩🇪 Germany: 1914–18: Fought in WWI, defeated, forced to sign Treaty of Versailles. 1920s: Crisis, hyperinflation. 1933: Hitler and the Nazis came to power. 1939: Invaded Poland → WWII began. 1940–41: Conquered most of Western Europe, invaded USSR. 1943–45: Defeats mounted, Allies advanced. 1945: Berlin fell, Hitler committed suicide, Germany surrendered.

🇬🇧 Britain: 1914–18: Fought in WWI, victorious but exhausted. 1920s–30s: Maintained vast empire, but weakening. 1939–40: Resisted Nazi attacks (Battle of Britain). 1941–45: Allied with U.S. and USSR in WWII. 1945: Won but economically drained, start of decolonization.

🇫🇷 France: 1914–18: Major WWI battlefield, won but devastated. 1920s–30s: Political division, economic hardship. 1940: Quickly defeated by Germany, Vichy regime established. 1940–44: French Resistance, Free France under De Gaulle. 1944: Liberated by Allies. 1945: Recovered but weakened, colonies began revolting (Vietnam, Algeria).

World War I (1914–1918): Austria–Hungary declared war on Serbia after the assassination of Archduke Franz Ferdinand → escalated into a global conflict. Battles of the Somme and Verdun: among the bloodiest in European history. U.S. joined in 1917 → shifted balance toward the Allies. 1918: Germany surrendered → war ended.

Russian Revolution (1917): February: Tsar Nicholas II abdicated. October: Lenin and the Bolsheviks seized power → start of the Soviet era.

Treaty of Versailles (1919) Officially ended WWI. Imposed harsh reparations and territorial losses on Germany → planted seeds for Hitler and WWII.

Great Depression (1929): Began in the U.S. with Wall Street crash. Spread worldwide → mass unemployment and poverty.

Rise of Fascism: Italy: Mussolini took power (1922). Germany: Hitler became Chancellor (1933). Japan: militarists gained dominance, invaded Manchuria (1931).

Second Sino–Japanese War (1937–1945): Japan launched full-scale invasion of China. Nanjing Massacre (1937): infamous atrocity.

World War II (1939–1945): 1939: Germany invaded Poland → war broke out. 1940: France fell, Britain stood alone. 1941: Pearl Harbor → U.S. entered the war. 1942–43: Battle of Stalingrad, Soviet counteroffensive turned the tide. 1944: D-Day, Allies landed in Normandy. 1945: Berlin fell, Hitler committed suicide, Germany surrendered. Aug 1945: U.S. dropped atomic bombs on Hiroshima and Nagasaki → Japan surrendered, WWII ended.

United Nations founded (1945): Created to prevent another global war.

Start of the Cold War (1947–1949) Ideological rivalry: Soviet Union vs United States. 1949: USSR tested its first atomic bomb → clear bipolar world order.

👉 Summary: 1912–1949 was marked by: 2 World Wars. The Russian Revolution. The Great Depression. The rise and fall of fascism. U.S. & USSR emerging as superpowers. The Cold War beginning.

1. Chemical Weapons – World War I (1914–1918): Germany, Britain, and France all used poison gas (chlorine, mustard gas). Caused hundreds of thousands of cases of blindness, burns, and slow deaths. First time humanity “experimented on a war scale” with chemical weapons.

2. Prisoner Experiments – Japan (Unit 731, 1932–1945): Based in Manchuria, China. Japanese army conducted live dissections on prisoners, tested plague, cholera, typhus bacteria. Released germ bombs on civilians. Considered one of the most brutal war crimes in Asia.

3. T-4 Program – Nazi Germany (1939–1945): Nazis carried out “euthanasia” of tens of thousands of disabled and mentally ill people, labeled as “useless.” Used gas chambers and lethal injections. Served as a “prototype” for later extermination camps.

4. Concentration Camp Experiments – Nazi Germany: Inhumane medical experiments on Jewish, Roma prisoners, POWs: Forced freezing to study hypothermia. Injections with experimental drugs, pathogens, live dissections. Bone graft experiments, twin studies (Dr. Mengele). Thousands died in agony.

5. Atomic Bomb – United States (1945): Not a medical experiment, but Hiroshima and Nagasaki bombings are often seen as a “real-world test” of nuclear power. Result: over 200,000 deaths from blast and radiation.

6. Drug & Medical Experiments – Soviet Union (1930s–1940s): Less documented, but records mention experiments on political prisoners and captured Germans during WWII. Included drug testing, extreme forced labor, and harsh “re-education camps.”

1. World War I – Trench Warfare (1914–1918): Millions of soldiers died in trenches, living among corpses, rats, poison gas. Battles of Verdun and the Somme: over 1 million casualties each.

2. Russian Revolution & Civil War (1917–1922) Tsar Nicholas II and his entire family executed (including children). Civil war between Reds and Whites caused millions of civilian deaths from famine and disease.

3. Ukrainian Famine (Holodomor, 1932–1933): Stalin’s forced collectivization triggered a man-made famine. 3–5 million starved to death, many women and children.

4. Japan’s Unit 731 (1930s–1945): Live dissections, plague, cholera, typhus experiments on Chinese, Korean, and Russian prisoners. Germ bombs dropped on civilians → mass deaths.

5. Nanjing Massacre (1937): Japanese forces captured Nanjing, killing ~200,000–300,000 civilians. Widespread sexual violence (20,000–80,000 women raped).

6. Nazi Concentration Camps (1940–1945): Holocaust: ~6 million Jews exterminated. Roma, homosexuals, and political prisoners also slaughtered. Notorious camps: Auschwitz, Dachau, Treblinka.

7. Inhumane Experiments in Camps: Dr. Mengele: twin studies, forced surgeries, freezing experiments. Thousands of prisoners died in agony.

8. Bengal Famine (1943): Under British rule in India during WWII. 2–3 million died of starvation, corpses scattered on the streets.

9. Atomic Bombs – Hiroshima & Nagasaki (1945): U.S. dropped two nuclear bombs. ~200,000 people killed instantly or later from burns and radiation. Cities wiped out in seconds, populations erased.

10. Chinese Civil War (1946–1949): Nationalists vs. Communists. Millions of civilians caught in crossfire, political massacres widespread.

👉 Summary: This era witnessed some of history’s darkest chapters: The Holocaust, Nanjing Massacre, Holodomor, Unit 731, Atomic bombings, Mass famines and inhumane experiments.