1939 September 1 04:45, the German army invaded Poland with the army of the client country Slovakia. Britain and France gave Nazi Germany 48 hours to withdraw from Polish territory. Britain and France declared war on Germany on September 3, 1939, because Germany did not listen to the warnings of Britain and France. None of the participating countries estimated that the war would surpass the scale of the First World War.

According to the secret clause of the Soviet-German non-aggression treaty and its dissatisfaction with the humiliating Riga Peace Treaty signed by 192 1, the Soviet Union recovered western Ukraine and western Belarus from the east in September 1939.

The German army and the Red Army joined forces at the Buge River on September 28th. Poland's war of aggression generally ended on June 6, 10, but Poland did not surrender to Germany or the Soviet Union. Moreover, the Polish government in exile organized a powerful underground organization in the Allies.

2. 1940 In May, the British and French allied forces retreated in Dunkirk, France.

1940 On May 25th, after the defense line of the Anglo-French allied forces collapsed under the rapid attack of the German mechanized troops, the British army made the largest military retreat in the port town of Dunkirk near the Belgian border in northeast France.

Although this large-scale evacuation operation, code-named "Generator Plan", enabled Britain and France to use various ships to evacuate a large number of troops, successfully saved a lot of manpower and saved their effective strength for future counterattacks. However, all the heavy equipment of the British Expeditionary Force in France was abandoned on the European continent, which caused serious problems in the ground defense of the British mainland.

The evacuation marked the withdrawal of British troops from the European continent, and the main areas of western Europe except Britain, Switzerland and Spain were occupied by Germany.

3.1941On June 22nd, Germany invaded the Soviet Union, the Soviet-German War broke out, and the Second World War further expanded.

194 1 On June 22nd, Nazi Germany tore up the Treaty of Non-Aggression between the Soviet Union and Germany (Molotov-ribbentrop Treaty), colluded with the servant countries Hungary, Romania and Finland, and drew up a plan code-named "Barbarossa".

Assembled 190 divisions with 5.5 million people, 4,900 planes, 3,700 tanks, 47,000 cannons and warships 190 ships, divided into three army groups, and launched a sudden attack on the Soviet Union in the form of blitzkrieg from north, middle and south directions, and the Soviet-German war broke out in an all-round way.

At the beginning of the war, due to the sudden attack of fascism, the Soviet army was defeated all the way. With the advantage of local forces and relatively advanced tactics, the Germans marched straight into the Soviet Union and launched a pincer-like offensive in Minsk, Kiev and other places, annihilating the effective forces of the Soviet Union on a large scale, with an average depth of 600 kilometers.

Until the Battle of Stalingrad broke out in June 1942, the German attack was frustrated, and the two sides were deadlocked in eastern Ukraine, with each other winning or losing. With the advantages of manpower and material resources, the Soviet army gradually took the initiative. 1In August, 943, the last strategic offensive of the German army on the Eastern Front was defeated in the Battle of Kursk, and it entered the stage of strategic counterattack.

Since then, the Soviets have launched a series of strategic offensives, recovered most of the territory, then occupied many countries in Eastern Europe, and finally 1945 captured Berlin, the German capital. At 0: 30 on May 9, the German government signed an unconditional surrender in Berlin, which took effect immediately, thus ending the Soviet-German war and marking the end of World War II in Europe.

This war allowed the Soviet Union to completely destroy the powerful Nazi Germany in the West. Since then, the area between the Federal Republic of Germany and the Soviet Union has become an occupied area of the Soviet Union, and the Soviet Union has become a superpower.

4.19411On February 7th, Japan attacked Pearl Harbor and dealt a heavy blow to the US Pacific fleet. The Pacific War broke out and the Second World War reached its largest scale.

19411On February 7th, imperial japanese navy attacked the United States and bombed warships and military targets in Pearl Harbor. More than 350 Japanese planes carried out two waves of attacks on the Pearl Harbor Naval Base, throwing armor-piercing projectiles and torpedoes at American battleships and cruisers.

The American army was unprepared. They woke up in a loud explosion and rushed to defend themselves. The whole pre-emptive attack ended in 90 minutes. At that time, Japan sank four battleships and two destroyers, blew up the 188 plane and damaged more buildings, ships and planes. About 2400 Americans were killed in the attack; Another 1250 people were injured, which greatly shocked the United States.

After the attack, Japan officially declared war on the United States. The next day, American President Roosevelt delivered a famous "national humiliation" speech, and then he signed a formal declaration of war against the Japanese Empire. A few days later, Nazi Germany and Italy declared war on the United States, and the United States immediately declared war.

5. 1942, 65438+ 1 year1October, 26 countries including China, the Soviet Union and the United States issued the United Nations Declaration, which marked the final formation of the anti-fascist front.

German, Italian and Japanese fascists provoked the Second World War, constantly expanding the scope and scale of aggression and promoting the unity of anti-fascist countries.

19411After the Pacific War broke out on February 7, Britain and the United States suffered heavy losses in the Asia-Pacific region and were forced to declare war on Japan. The United States, China, Australia and other countries declared war on Germany, Italy and Japan, formally joined the anti-fascist war, and the international anti-fascist forces further expanded.

In order to discuss countermeasures, draw up battle plans and enhance international prestige, the United States and Britain met with US President F D Roosevelt and British Prime Minister W L S Churchill in Washington from February 22 to February 22.

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