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Germany invades Poland
German forces bombard Poland on land and from the air, as Adolf Hitler seeks to regain lost territory and ultimately rule Poland. World War II had begun. The German invasion of Poland was a primer on how Hitler intended to wage war–what would become the “blitzkrieg” strategy. This was characterized by extensive bombing early on to destroy the enemy’s air capacity, railroads, communication lines, and munitions dumps, followed by a massive land invasion with overwhelming numbers of troops, tanks, -
Britain, France, Australia and New Zealand declare war on Germany.
The Allied Forces of Great Britain, France, Australia and New Zealand responded to Nazi Germany's invasion of Poland by declaring war. Two days before war was declared, German forces had bombed Polish cities and towns, killing and injuring thousands. After the Germans failed to meet a deadline set by The Allies to retreat from Poland, British Prime Minister Neville Chamberlain announced on radio: "I have to tell you now that no such undertaking has been received and consequently this country is -
Canada declares war on Germany.
Vincent Massey, Canada's High Commissioner to the United Kingdom, brought the document to King George VI, at the Royal Lodge, Windsor Great Park, for his signature, whereupon Canada had officially declared war on Nazi Germany.In his capacity as the government's official recorder for the war effort, Leonard Brockington noted: "King George VI of England did not ask us to declare war for him—we asked King George VI of Canada to declare war for us." -
Soviet Union invades eastern Poland.
Soviet Foreign Minister Vyacheslav Molotov declares that the Polish government has ceased to exist, as the U.S.S.R. exercises the “fine print” of the Hitler-Stalin Non-aggression pact—the invasion and occupation of eastern Poland. Hitler’s troops were already wreaking havoc in Poland, having invaded on the first of the month. The Polish army began retreating and regrouping east, near Lvov, in eastern Galicia, attempting to escape relentless German land and air offensives. But Polish troops had -
Surrender of Warsaw
140,000 Polish troops are taken prisoner by the German invaders as Warsaw surrenders to the superior mechanized forces of Hitler’s army. The Poles fought bravely, but were able to hold on for only 26 days. On the heels of its victory, the Germans began a systematic program of terror, murder, and cruelty, executing members of Poland’s middle and upper classes: Doctors, teachers, priests, landowners, and businessmen were rounded up and killed. The Nazis had given this operation the benign-soundin -
Soviet Union invades Finland.
the Red Army crosses the Soviet-Finnish border with 465,000 men and 1,000 aircraft. Helsinki was bombed, and 61 Finns were killed in an air raid that steeled the Finns for resistance, not capitulation.The overwhelming forces arrayed against Finland convinced most Western nations, as well as the Soviets themselves, that the invasion of Finland would be a cakewalk. The Soviet soldiers even wore summer uniforms, despite the onset of the Scandinavian winter; it was simply assumed that no outdoor a -
Finland signs peace treaty with Soviet Union
It marked the end of the 105-day Winter War. The treaty ceded parts of Finland to the Soviet Union. However, it preserved Finland's independence, ending the Soviet attempt to annex the country. The treaty was signed by Vyacheslav Molotov, Andrey Zhdanov and Aleksandr Vasilevsky for Soviet Union, and Risto Ryti, Juho Kusti Paasikivi, Rudolf Walden and Väinö Voionmaa for Finland. -
Germany begins occupation of Denmark and invades Norway.
German warships enter major Norwegian ports, from Narvik to Oslo, deploying thousands of German troops and occupying Norway. At the same time, German forces occupy Copenhagen, among other Danish cities. German forces were able to slip through the mines Britain had laid around Norwegian ports because local garrisons were ordered to allow the Germans to land unopposed. The order came from a Norwegian commander loyal to Norway’s pro-fascist former foreign minister Vidkun Quisling. Hours after the -
British Prime Minister, Chamberlain, resigns, replaced by Churchill.
Winston Churchill, First Lord of the Admiralty, is called to replace Neville Chamberlain as British prime minister following the latter’s resignation after losing a confidence vote in the House of Commons. In 1938, Prime Minister Chamberlain signed the Munich Pact with Nazi leader Adolf Hitler, giving Czechoslovakia over to German conquest but bringing, as Chamberlain promised, “peace in our time.” In September 1939, that peace was shattered by Hitler’s invasion of Poland. Chamberlain declared -
Italy declares war on Britain and France
After withholding formal allegiance to either side in the battle between Germany and the Allies, Benito Mussolini, dictator of Italy, declares war on France and Great Britain. What caused Il Duce’s change of heart? Perhaps the German occupation of Paris did it. “First they were too cowardly to take part. Now they are in a hurry so that they can share in the spoils,” reflected Hitler. (However, Mussolini claimed that he wanted in before complete French capitulation only because fascism “did not -
Germany invades Yugoslavia and Greece.
The German air force launches Operation Castigo, the bombing of Belgrade, on this day in 1941, as 24 divisions and 1,200 tanks drive into Greece.
The attack on Yugoslavia was swift and brutal, an act of terror resulting in the death of 17,000 civilians–the largest number of civilian casualties in a single day since the start of the war. Making the slaughter all the worse was that nearby towns and villages had emptied out into the capital city to celebrate Palm Sunday. All of Yugoslavia’s airfie -
Germans capture Athens
The German army enters the Greek capital, signaling the end of Greek resistance. All mainland Greece and all the Greek Aegean islands except Crete are under German occupation by May 11. In fending off the Axis invaders, the Greeks suffer the loss of 15,700 men. Greece will not be liberated until 1944, by British troops from the Mediterranean theater. -
Operation Barbarossa - Germany invades Soviet Union.
Adolf Hitler launched his armies eastward in a massive invasion of the Soviet Union: three great army groups with over three million German soldiers, 150 divisions, and three thousand tanks smashed across the frontier into Soviet territory. The invasion covered a front from the North Cape to the Black Sea, a distance of two thousand miles. By this point German combat effectiveness had reached its apogee; in training, doctrine, and fighting ability, the forces invading Russia represented the fine -
Japanese attack on Pearl Harbour.
Just before 8 a.m. on hundreds of Japanese fighter planes attacked the American naval base at Pearl Harbor near Honolulu, Hawaii. The barrage lasted just two hours, but it was devastating: The Japanese managed to destroy nearly 20 American naval vessels, including eight enormous battleships, and almost 200 airplanes. More than 2,000 Americans soldiers and sailors died in the attack, and another 1,000 were wounded. The day after the assault, President Franklin D. Roosevelt asked -
The United States declares war on Japan
As America’s Pacific fleet lay in ruins at Pearl Harbor, President Franklin Roosevelt requests, and receives, a declaration of war against Japan. Leaning heavily on the arm of his son James, a Marine captain, FDR walked haltingly into the House of Representatives at noon to request a declaration of war from the House and address the nation via radio. “Yesterday,” the president proclaimed, “December 7, 1941—a date which will live in infamy—the United States of America was suddenly and deliberate -
December 11th - Germany declares war on USA
Adolf Hitler declares war on the United States, bringing America, which had been neutral, into the European conflict.
The bombing of Pearl Harbor surprised even Germany. Although Hitler had made an oral agreement with his Axis partner Japan that Germany would join a war against the United States, he was uncertain as to how the war would be engaged. Japan’s attack on Pearl Harbor answered that question. On December 8, Japanese Ambassador Oshima went to German Foreign Minister von Ribbentrop to n -
February 15th - Singapore falls to Japanese.
Singapore, the “Gibraltar of the East” and a strategic British stronghold, falls to Japanese forces. An island city and the capital of the Straits Settlement of the Malay Peninsula, Singapore had been a British colony since the 19th century. In July 1941, when Japanese troops occupied French Indochina, the Japanese telegraphed their intentions to transfer Singapore from the British to its own burgeoning empire. Sure enough, on the eve of the Pearl Harbor attack, 24,000 Japanese troops were tran -
June 4th - Battle of Midway - 4 Japanese carriers sunk.
Battle of Midway–one of the most decisive U.S. victories against Japan during World War II–begins. During the four-day sea-and-air battle, the outnumbered U.S. Pacific Fleet succeeded in destroying four Japanese aircraft carriers while losing only one of its own, the Yorktown, to the previously invincible Japanese navy. In six months of offensives prior to Midway, the Japanese had triumphed in lands throughout the Pacific, including Malaysia, Singapore, the Dutch East Indies, the Philippines a -
July 3rd - Sevastopol falls to Germans.
The remaining Soviet forces surrendered and the Axis seized the port. Both sides had suffered considerable losses during the siege and attack.
With the Soviet forces neutralised, the Axis refocused their attention on the major summer campaign of that year, Operation Blue and their advance to the Caucasus oil fields. -
Battle of El Alamein begins.
The Battle of El Alamein marked the culmination of the World War II North African campaign between the British Empire and the German-Italian army. Deploying a far larger contingent of soldiers and tanks than the opposition, British commander Bernard Law Montgomery launched an infantry attack at El Alamein on Oct. 23, 1942. German Field Marshal Erwin Rommel returned to battle from illness and tried to halt the tide, but the British advantage in personnel and artillery proved too overwhelming. Aft -
German surrender at Stalingrad.
the last of the German forces fighting at Stalingrad surrender, despite Hitler’s earlier declaration that “Surrender is out of the question. The troops will defend themselves to the last!” The Battle of Stalingrad began in the summer of 1942, as German forces assaulted the city, a major industrial center and a potential strategic coup. But despite repeated attempts, the German 6th Army, under Friedrich von Paulus, and part of the 4th Panzer Army, under Ewald von Kleist, could not break past the -
May 12th - Surrender of Axis forces in North Africa.
The campaign was fought between the Allies and Axis powers, many of whom had colonial interests in Africa dating from the late 19th century. The Allied war effort was dominated by the British Commonwealth and exiles from German-occupied Europe. -
Operation Husky - Allied landings in Sicily.
Operation Husky, the code name for the invasion of Sicily, began with airborne and amphibious landings on the island’s southern shores. Jarred by the Allied invasion, the Italian fascist regime fell rapidly into disrepute, as the Allies had hoped. -
Mussolini's Italian Fascist government overthrown.
On this day in 1943, Benito Mussolini, fascist dictator of Italy, is voted out of power by his own Grand Council and arrested upon leaving a meeting with King Vittorio Emanuele, who tells Il Duce that the war is lost. Mussolini responded to it all with an uncharacteristic meekness.
During the evening of July 24 and the early hours of the 25th, the Grand Council of the fascist government met to discuss the immediate future of Italy. While all in attendance were jittery about countermanding their -
September 3rd - Italy signs armistice.
Montgomery’s 8th Army began its invasion of the Italian mainland and the Italian government agreed to surrender to the Allies. By the terms of the agreement, the Italians would be treated with leniency if they aided the Allies in expelling the Germans from Italy. Later that month, Mussolini was rescued from a prison in the Abruzzo Mountains by German commandos and was installed as leader of a Nazi puppet state in northern Italy. -
Rome captured by Allies.
Allied forces begin a major assault on the Gustav Line, a German defensive line drawn across central Italy just south of Rome.
The Gustav Line represented a stubborn German defense, built by Field Marshal Albert Kesselring, that had to be broken before the Italian capital could be taken; the attack on the line was also part of a larger plan to force the Germans to commit as many troops to Italy as possible in order to make way for an Allied cross-Channel assault—what would become D-Day. With th -
Operation Neptune/Overlord - Allied invasion of Normandy.
future President Dwight D. Eisenhower, then supreme commander of Allied Expeditionary Forces in World War II gives the go-ahead for a massive invasion of Europe called Operation Overlord. Back in America, President Franklin Roosevelt waited for word of the invasion’s success.
By the first week of June 1944, Nazi Germany controlled most of Western Europe. Allied forces, numbering 156,000, were poised to travel by ship or plane over the English Channel to attack the German army dug in at Normandy -
Allies liberate Paris
French General Jacques Leclerc enters the free French capital triumphantly. Pockets of German intransigence remained, but Paris was free from German control.
Two days earlier, a French armored division had begun advancing on the capital. Members of the Resistance, now called the French Forces of the Interior, proceeded to free all French civilian prisoners in Paris. The Germans were still counterattacking, setting fire to the Grand Palais, which had been taken over by the Resistance, and killin -
Soviets capture Warsaw.
Soviet troops liberate the Polish capital from German occupation.
Warsaw was a battleground since the opening day of fighting in the European theater. Germany declared war by launching an air raid on September 1, 1939, and followed up with a siege that killed tens of thousands of Polish civilians and wreaked havoc on historic monuments. Deprived of electricity, water, and food, and with 25 percent of the city’s homes destroyed, Warsaw surrendered to the Germans on September 27. The USSR had sn -
US President Roosevelt dies - Truman becomes President.
President Franklin Delano Roosevelt passes away after four momentous terms in office, leaving Vice President Harry S. Truman in charge of a country still fighting the Second World War and in possession of a weapon of unprecedented and terrifying power.
On a clear spring day at his Warm Springs, Georgia, retreat, Roosevelt sat in the living room with Lucy Mercer (with whom he had resumed an extramarital affair), two cousins and his dog Fala, while the artist Elizabeth Shoumatoff painted his port -
Mussolini captured by partisans and executed
“Il Duce,” Benito Mussolini, and his mistress, Clara Petacci, are shot by Italian partisans who had captured the couple as they attempted to flee to Switzerland.
The 61-year-old deposed former dictator of Italy was established by his German allies as the figurehead of a puppet government in northern Italy during the German occupation toward the close of the war. As the Allies fought their way up the Italian peninsula, defeat of the Axis powers all but certain, Mussolini considered his options. -
Hitler commits suicide.
Adolf Hitler commits suicide by swallowing a cyanide capsule and shooting himself in the head. Soon after, Germany unconditionally surrendered to the Allied forces, ending Hitler’s dreams of a “1,000-year” Reich.
Since at least 1943, it was becoming increasingly clear that Germany would fold under the pressure of the Allied forces. In February of that year, the German 6th Army, lured deep into the Soviet Union, was annihilated at the Battle of Stalingrad, and German hopes for a sustained offens -
Atomic bomb dropped on Hiroshima
The United States becomes the first and only nation to use atomic weaponry during wartime when it drops an atomic bomb on the Japanese city of Hiroshima. Though the dropping of the atomic bomb on Japan marked the end of World War II, many historians argue that it also ignited the Cold War.Since 1940, the United States had been working on developing an atomic weapon, after having been warned by Albert Einstein that Nazi Germany was already conducting research into nuclear weapons. -
Japanese surrender.
An official announcement of Japan’s unconditional surrender to the Allies is made public to the Japanese people.
Even though Japan’s War Council, urged by Emperor Hirohito, had already submitted a formal declaration of surrender to the Allies, via ambassadors, on August 10, fighting continued between the Japanese and the Soviets in Manchuria and between the Japanese and the United States in the South Pacific. In fact, two days after the Council agreed to surrender, a Japanese submarine sank the