History - World War II (1939–1945)

Comprehensive vocabulary flashcards covering the major operations, strategic policies, key battles, military technologies, and timelines of World War II from 1939 to 1945 across the European and Pacific theaters.

Blitzkrieg

The German "lightning war" military tactic that used rapid, coordinated attacks to penetrate enemy lines, enabling Germany to occupy Poland within weeks after invading on September 1, 1939.

Non-Aggression Pact

The treaty signed between Nazi Germany and the Soviet Union before the invasion of Poland to ensure Russia would not defend Poland; Hitler later broke it by invading Russia.

Axis Powers

The alliance of Germany, Italy, and Japan during World War II, united by fascist leadership and aggressive territorial expansionism.

Allied Powers

The coalition initially formed by countries including Great Britain and France, later joined by the Soviet Union and the United States, to combat the Axis powers.

Maginot Line

A heavily fortified defensive concrete and obstacle border built by France along its border with Germany, which was bypassed when German forces invaded through the Ardennes Forest, Belgium, and Luxembourg.

Ardennes Forest

A dense, forested region believed by France to be impassable for tanks, through which German forces launched a surprise invasion in May 1940 that rapidly overwhelmed Allied defenses.

Dunkirk Evacuation (Operation Dynamo)

The massive rescue mission between 24 May and 4 June 1940 in which $700$ civilian private boats crossed the English Channel to evacuate approximately $340\,000$ Allied troops trapped on the beaches around the port of Dunkirk.

Vichy Regime

The collaborationist French government established to rule France under German control after the formal French surrender on June 22, 1940.

Battle of Britain

The air campaign fought between the British Royal Air Force (RAF) and the German Luftwaffe from July to September 1940, where the outnumbered RAF used aerial detection radar to halt Hitler's invasion plans.

The Blitz

The round-the-clock bombing campaign conducted by Germany against Great Britain's cities, industrial centres, and military bases from September 1940 to May 1941, dropping $30\,000\text{ tons}$ of bombs and killing $40\,000$ civilians.

Operation Barbarossa

The June 1941 German invasion of the Soviet Union that mobilized $3\text{ million}$ soldiers across a $2000\text{ km}$ frontline, initiating a multi-front war for Germany.

Lebensraum

The concept of "living space" motivating Hitler's eastern expansion, aiming to eliminate the population of Western Russia to resettle Germans and exploit Russian agricultural wheat and oil reserves.

Scorched Earth Policy

Stalin's defensive directive ordering retreating Soviet forces and citizens to evacuate valuable goods and destroy all remaining buildings, crops, and infrastructure to deny the advancing German army resources and shelter.

Siege of Leningrad

A catastrophic German encirclement of Leningrad lasting from October 1941 to 1944 that cut off land routes, power, and food, causing over $1\text{ million}$ civilian deaths and the loss of nearly $1.5\text{ million}$ Soviet soldiers.

Lake Ladoga Corridor

A narrow logistical passage secured by Soviet troops that provided a limited supply lifeline of food and materials into the besieged city of Leningrad across the lake.

Battle of Stalingrad

A five-month turning point battle in the war on the Eastern Front (begun in 1942) where Soviet forces encircled German troops in the devastated city, culminating in an unconditional German surrender and the loss of $800\,000$ Axis troops.

Policy of Isolationism

The diplomatic and political stance maintained by the United States prior to 1941, aimed at staying out of European conflict while gradually sending supplies and escorting Allied naval convoys.

Pearl Harbour Attack

A surprise morning attack launched by the Japanese military on the US naval base in Hawaii on December 7, 1941, involving $350$ planes, sinking $8$ battleships, killing $2400$ Americans, and precipitating the entry of the US into the war.

Battle of Midway

A major Pacific naval engagement in which the United States deciphered intercepted Japanese codes to anticipate and thwart an attack on a US base, resulting in a pivotal American victory.

Island Hopping

The Allied Pacific military strategy spearheaded by the United States that bypassed heavily fortified strongholds to seize strategic islands, steadily advancing toward mainland Japan.

Operation Overlord (D-Day)

The Allied amphibious invasion launched on June 6, 1944, across the beaches of Normandy with $3.5\text{ million}$ assembled troops, establishing a Western Front in Europe and leading to the liberation of Paris by late August 1944.

V-E Day (Victory in Europe Day)

May 8, 1945, commemorating the complete and unconditional surrender of Nazi Germany following the Red Army's capture of Berlin.

Little Boy

The uranium-based atomic bomb dropped by the B-29 bomber Enola Gay on Hiroshima on August 6, 1945, detonating $600\text{ m}$ above the city and causing approximately $140\,000$ total deaths by the end of 1945.

Fat Man

The plutonium-based atomic bomb dropped by the B-29 bomber Bockscar on Nagasaki on August 9, 1945, which killed over $70\,000$ people by the end of 1945.

September 2, 1945

The date on which Japan signed the formal instrument of surrender, officially bringing an end to World War II following Emperor Hirohito's radio announcement on August 15.

Fall of Warsaw (September 1939)

The capture of Poland's capital by German forces on September 28, 1939, concluding the invasion that initiated World War II.

Soviet invasion of eastern Poland

The offensive launched by the USSR on September 17, 1939, which completed the partition of Poland agreed upon in the Non-Aggression Pact.

Allied invasion of Sicily (1943)

The Mediterranean campaign launched after Allied victory in North Africa that led directly to the overthrow of Benito Mussolini within $38\text{ days}$.

Allied strategic bombing campaign

The aerial offensive launched in 1942 targeting major German industrial infrastructure and cities, including widespread bombings of Berlin and Dresden.

Execution of Benito Mussolini

The death of the Italian dictator by partisan firing squad on April 28, 1945, following his capture near the Swiss border.

April 30, 1945

The date Adolf Hitler committed suicide in his underground Berlin bunker as Soviet forces encircled the city, after handing power over to Joseph Goebbels.

British home front adaptations during the Blitz

Protective practices adopted by UK civilians, such as mandatory nighttime blackouts, planting vegetable gardens due to food rationing, and sheltering inside Underground train stations.

Primary rationales for dropping atomic bombs

Strategic goals pursued by the United States that included forcing an immediate Japanese surrender, avoiding an invasion estimated to cause millions of casualties, and demonstrating military power to the USSR.

Stalingrad Axis POW survival rate

Out of approximately $90\,000$ German soldiers who surrendered at Stalingrad, only about $5000$ survived captivity in Soviet POW camps.

August 15, 1945

The date Emperor Hirohito broadcast an imperial radio address to the Japanese people announcing Japan's surrender, preceding the formal signing on September 2.

Declaration of war by Britain and France (September 3, 1939)

The official Allied response issued two days after Nazi Germany invaded Poland, marking the formal beginning of World War II in Europe.

German diversionary strategy in the Battle of France

The tactic of launching feint attacks to lure Allied armies forward before executing a surprise thrust through Belgium and Luxembourg to trap Allied forces against the northern coast.

Nazi capture of Paris (June 1940)

The occupation of the French capital on June 14, 1940, occurring one month after the initial German offensive and leading to the formal armistice on June 22.

Battle of Britain casualty and loss disparity

The outcome where the RAF, despite being outnumbered $1$ to $4$, lost $500$ pilots and $1000$ aircraft, while inflicting losses of nearly $2000$ planes and $3000$ airmen on the German Luftwaffe.

Environmental obstacles in Operation Barbarossa (late 1941)

Autumn rain and snow turning unpaved roads into thick mud that bogged down tanks, followed by sub-zero winter temperatures that jammed weapons and froze radiator water.

Defense of Moscow (late 1941)

The fortified resistance mounted by Soviet troops and local civilians that successfully halted the German advance toward the capital following the capture of surrounding regional hubs.

Battle of Stalingrad casualty figures

The devastating losses comprising $800\,000$ Axis deaths, $500\,000$ Soviet military fatalities, $600\,000$ Soviet soldiers wounded or captured, and $40\,000$ Soviet civilian deaths.

Enola Gay

The American B-29 Superfortress bomber that delivered the "Little Boy" uranium atomic bomb over Hiroshima on August 6, 1945.

Bockscar

The American B-29 bomber that dropped the plutonium-based "Fat Man" atomic bomb onto Nagasaki on August 9, 1945.

Topographical factor in the Nagasaki atomic bombing

The surrounding hills and valleys of the city that helped contain and limit the total blast destruction compared to the flat terrain of Hiroshima.

Two-wave attack tactic at Pearl Harbour

The Japanese aerial strategy where an initial strike of $180$ planes targeted battleships and airfields at 7:55 AM, followed $50\text{ minutes}$ later by a secondary wave of $170$ planes targeting oil storage tanks and aircraft hangars.

Fate of the Goebbels family

Following Adolf Hitler's suicide on April 30, 1945, the newly designated German Chancellor and his wife fatally poisoned their six children before taking cyanide themselves in the Berlin bunker.

Public display of Benito Mussolini (April 1945)

The public hanging and desecration of the executed fascist leader's body in a public square in Milan after his capture by Italian partisans near the Swiss border.

Hiroshima atomic bombing devastation metrics

The immediate loss of $70\,000$ to $80\,000$ lives, rising to approximately $140\,000$ by the end of 1945, coupled with the destruction of over $60\%$ of the city's standing structures.