there were many reasons for the outbreak of WWII in 1939 including.
Conscription and rearmament- this was when Hitler disobeyed the ruling of the Treaty of Versailles by Reintroducing conscription and massively rearming the german armed forces past the limit of 100,000 men which was set by the Treaty of Versailles. this made the British government feel uneasy but Neville Chamberlain decide to follow a policy of appeasement, and allowed this.
Remilitarization of the Rhineland this was also against the Treaty of Versailles and as above Neville chamberlain appeased this.
Anschluss with Austria this was when Germany joined with Austria this was brought about by uproar in Austria caused by German Austrians who wanted to be reunited with the fatherland. Germany also called for a referendum which resulted with a vote 99.7 in favor of Anschluss. this was again against the Treaty of Versailles but again Neville Chamberlain appeased Hitler.
Munich agreement- this was when Hitler decided he wanted the Sudetenland (a very industrious land in Czechoslovakia). this was also against the Treaty of Versailles but Chamberlain continued to appease Hitler.
Czechoslovakia- this was Hitler's invasion of Czechoslovakia.
After a great success with the Munich agreement Hitler decided that he wanted all of Czechoslovakia. he immediately marched his troops into Prague. still against the Treaty of Versailles but Chamberlain still appeased Hitler
USSR-NAZI non aggression pact. this was when Germany signed a treaty with the USSR to enable them to acquire Poland without any trouble. they decided to split their colonies equally. this really enraged the British government so much that Neville Chamberlain threatened to Declare war on Germany if they invaded Poland
Poland- this was the straw that broke the camel's back. Germany and the USSR sent their troops to Warsaw on the 1st of September 1939. after this Chamberlain sent the notice to the British diplomatic representatives in Germany to issue a declaration of war.
in conclusion you could say that there was many reasons for the outbreak of war in 1939 and no, one reason was the most important.
the german invasion of Poland
The outbreak of another world war in 1939 was in part caused by the British appeasement-policy of the 1930s. Other factors were responsible, as well, such as the intentional and determined aggression of Germany.
The Gem, a British boys' magazine, ended publication in 1939 due to declining sales and financial difficulties caused by the outbreak of World War II.
The German attack on Poland 1 September 1939
The Prime Minister of the UK at the outbreak of war on 3rd September 1939 was Neville Chamberlain (Con)
In the 1930's, Britain and France had a defence agreement with Poland. On 1 September 1939, German forces attacked Poland, so on 3 September 1939 Britain and France declared war on Germany.
Germany invaded Poland on September 1, 1939, and caused panic in Europe.
The Blackout. I am doing a World War 2 project for school. The Blackout in World War 2 started on the 1st of September 1939, 2 days after the outbreak of the war. (WWII) I am still not sure when the Blackout ended. Good Luck with that, thingymabobSeptenber 1, 1939-September 2, 1945
At its outbreak in 1939.
The invasion of Poland on the 1st September 1939
Here is the main summary of why World War 2 happened from an article. World War Two began in September 1939 when Britain and France declared war on Germany following Germany's invasion of Poland. Although the outbreak of war was triggered by Germany's invasion of Poland, the causes of the war are more complex.
September 1, 1939 .