World War 2 was between the Axis Powers. Which included Germany, Italy, and Japan, and the Allied Powers, which included the United States, Russia, Britain, and France. In total, ten countries were fighting in World War 2. Here are the 10 countries that were involved in World War 2

1) Poland in World War 2

The first major battle of World War II took place between September 1–7, 1939, when Poland was invaded by Nazi Germany, prompting France and Britain to declare war on Germany. Although defeated, Poland fought valiantly and its soldiers inflicted serious losses against German forces at Westerplatte and Hel Peninsula before capitulating on September 28, 1939.

Two years later, Warsaw was liberated from German occupation by Soviet troops. Following its second liberation, Poland remained under Soviet domination until 1989 and became one of only two countries (along with Czechoslovakia) that successfully resisted Soviet control after World War 2.

In 1980, martial law was declared by Poland’s communist government; Solidarity formed shortly thereafter, launching a non-violent movement aimed at undermining communist rule. Three years later, martial law ended as Polish authorities legalized Solidarity; by 1990 Lech Walesa had become president of a free Polish state.

2) France in World War 2

When war broke out in September 1939, France had a population of 40 million and a standing army of 4.5 million men. Although hampered by an aging aircraft fleet and inadequate tanks and artillery, French soldiers fought courageously but could not stop German panzer divisions from sweeping through Belgium and into northern France.

In June 1940, France surrendered after Germany smashed its way to Paris through both Holland and Belgium. An armistice divided France into occupied and unoccupied zones; collaborationists ruled those areas controlled by Nazi forces while Free French forces operated under Charles de Gaulle’s leadership in London.

3) Germany in World War 2

At its core, World War 2 was a battle between Nazi Germany and Allied nations including Britain, France, Russia, and America. Led by Adolf Hitler, Germany was an expansionist country that aggressively went after other countries to secure land for German people to live on and resources to fuel their powerful war machine.

The Allies fought back against Hitler’s aggression starting with Poland’s invasion in 1939. World War 2 lasted from 1939 until 1945 when Germany finally surrendered.

4) Italy in World War 2

Italy entered World War II on June 10, 1940, declaring war on France and Britain after Mussolini failed to persuade them to allow Italy a free hand in Africa. It then invaded Albania (which surrendered quickly) and Greece (which didn’t). Despite its involvement, Italy was little more than a puppet of Nazi Germany, and its role as an Axis power during World War II was put in dispute by historians.

On April 27, 1945, with no sign of a German collapse. King Victor Emmanuel III dismissed Mussolini and appointed General Pietro Badoglio as Prime Minister. He ordered Badoglio to surrender all military forces at once but instead, Badoglio collaborated with Eisenhower and declared a cease-fire with Allied troops already closing in on all fronts. Soon afterward, Mussolini was captured and executed by Italian partisans.

His body hung upside down in Milan’s Piazzale Loreto for public viewing. His mistress Clara Petacci went to her death dressed in a striped suit with an executioner’s band playing Suona la reiterate (Sound Retreat). To cover up their treachery towards their Fascist leader, they were both strung up along with fifteen other men who had been executed earlier that day.

5) The Soviet Union in World War 2

Joseph Stalin was one of Hitler’s greatest foes, and his nation entered World War II after Germany invaded Poland. On September 17, 1939, Stalin and British Prime Minister Winston Churchill signed a treaty pledging mutual assistance if either country were under attack by Germany.

In June 1941, however, Germany invaded Russia (after first invading Poland) and proved to be a formidable foe for both countries. The Soviet Union suffered more than 20 million civilian casualties during World War II more than any other nation in human history.

Even so, its army continued to fight until May 1945 when it marched into Berlin alongside American soldiers. At war’s end, Eastern Europe fell under Soviet influence with German soldiers being sent back home.

6) The UK in World War II

Of course, Britain and its Commonwealth have their heavy involvement in World War II. Britain’s declaration of war against Germany on September 3, 1939, marked its full entry into one of history’s bloodiest conflicts.

On July 31, 1940, after intensive bombing raids by Luftwaffe planes, 15 million pounds of high explosives dropped on London’s East End, which left thousands dead and injured. More than 1 million households suffered damage.

This period has the Name “The Blitz”. The British also participated actively in many Allied military operations, including Bomber Command’s strategic campaign to destroy German industry and logistics during World War II with attacks on German cities.

7) China in World War II

In 1937, China and Japan went to war, with China suffering a brutal defeat. Japan then occupied large swathes of Chinese territory until 1945. In 1948, the Communists won control of mainland China and established The People’s Republic of China under Mao Zedong.

Since then, China has involvement in several major conflicts. Among these are wars with India (1962), Vietnam (1979), Russia (1969-1970), and Taiwan (1999). Most recently, tensions have grown between China and some of its neighbors over territorial disputes in East Asia.

Several nations, most notably Japan, claim islands or maritime territories controlled by Beijing as their own, but at present, there is no overt conflict over these territories.

8) The USA in World War II

The US entered World War II following a surprise bombing of Pearl Harbor. When Japanese fighter planes from six aircraft carriers attacked American battleships on December 7, 1941. The day before, President Franklin D. Roosevelt had delivered his famous date which will live in infamy to Congress asking for a declaration of war against Japan.

On June 6, 1944, Allied forces stormed Normandy Beach (Côte d’Azur) in France and began liberating Western Europe from Nazi control. Troops of Britain and Canada join them.

9) Australia in World War II

Australia joined Britain’s declaration of war on Germany in 1939. Australia entered World War II due to its alliance with Great Britain, which declared war on Germany after its invasion of Poland. In early 1942, Japanese bombers attacked Sydney and Newcastle, causing major damage and killing more than 200 people.

After defeating Japan at sea in 1942 and 1943. Australian forces played a limited role with Allied campaigns in Italy until late 1944 when they invaded islands off Borneo. By 1945, U.S., British, and other allied troops were preparing for an invasion of Japan when atomic bombs forced their surrender.

What began as a European conflict became global when Japan, Germany, and Italy declared war on China in 1937? By late 1941, with Japan controlling most of Southeast Asia and German submarine warfare threatening to cut off essential supplies from reaching Britain, U.S. President Franklin D. Roosevelt joined Britain’s declaration of war on Germany after its invasion of Poland.

10) Japan in World War II

Japan declared war on China in 1937.  Japan joined forces with Germany and Italy after signing an alliance with them two years later. After joining forces with Germany. Japan took control of French Indochina and northern French Indochina became a new Japanese puppet state.

The U.S., UK, Canada, Australia, India, South Africa, and New Zealand declared war on Japan. After they bombed Pearl Harbor in December 1941. In this war, Italy and Germany were allies of Japan against America.

In August 1945, at least 100,000 people were killed when atomic bombs were dropped on Hiroshima and Nagasaki. Japan surrendered shortly after to Allied forces and WWII officially ended.

For 70 years it was the perception that no one survived the Nagasaki attack. Now there is evidence that four people survived by chance.


The tenure of World War II was between 1939 and 1945. More than 50 countries show involvement, including all of the great powers: The Axis Powers: Germany, Japan, and Italy. On the other hand Allied Powers: France, Great Britain, and Russia (later joined by China); neutral countries (Switzerland); and other non-combatants.

Of these countries, only a handful of France, Great Britain, Russia participated actively. All three fronts won significant territory in Europe. Altogether, more than 100 million people participated in World War II for at least a short period. This is a list of some of the countries that participated less directly.


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