Title: History of Germany
Content:  Poland on 1 September 1939. Britain and France declared war on Germany two days later and World War II in Europe began. After establishing the "Rome-Berlin axis" with Benito Mussolini, and signing the Anti-Comintern Pact with Japan – which was joined by Italy a year later in 1937 – Hitler felt able to take the offensive in foreign policy. On 12 March 1938, German troops marched into Austria, where an attempted Nazi coup had been unsuccessful in 1934. When Austrian-born Hitler entered Vienna, he was greeted by loud cheers. Four weeks later, 99% of Austrians voted in favour of the annexation (Anschluss) of their country to the German Reich. After Austria, Hitler turned to Czechoslovakia, where the 3.5 million-strong Sudeten German 
Title: World War II by country
Content:   Nazi Germany, led by Adolf Hitler, was the primary Axis Power in the European Theatre. German forces instigated the war in September 1939 by invading Poland. Poland was divided with the Soviet Union. The Phony War ensued and in the spring of 1940 German forces invaded and conquered Denmark, Norway, France, Belgium, Luxembourg, and the Netherlands. Attempts to subdue the United Kingdom by air in the summer of 1940 failed and a planned invasion was called off. In the summer of 1941 Germany turned its forces east by invading the Soviet Union. The Eastern Front became the main theatre of war for the Germans. The invasion of the USSR had been delayed by campaigns in Greece 
Title: History of Germany
Content:  On 1 September 1939, Germany initiated World War II in Europe with the invasion of Poland. After forming a pact with the Soviet Union in 1939, Hitler and Stalin divided Eastern Europe. After a "Phoney War" in spring 1940, German forces swiftly conquered Denmark, Norway, Belgium, Luxembourg, the Netherlands, and France, and forced the British army out of Western Europe. In 1941, Hitler's army invaded Yugoslavia, Greece and the Soviet Union. Racism, especially antisemitism, was a central feature of the Nazi regime. In Germany, but predominantly in the German-occupied areas, the systematic genocide program known as the Holocaust killed 17 million people, including 6 million Jews (representing 
Title: Germany
Content:  spheres of influence. On 1 September 1939, Germany invaded Poland, beginning World War II in Europe; Britain and France declared war on Germany on 3 September. In the spring of 1940, Germany conquered Denmark and Norway, the Netherlands, Belgium, Luxembourg, and France, forcing the French government to sign an armistice. The British repelled German air attacks in the Battle of Britain in the same year. In 1941, German troops invaded Yugoslavia, Greece and the Soviet Union. By 1942, Germany and its allies controlled most of continental Europe and North Africa, but following the Soviet victory at the Battle of 
Title: Political history of the world
Content:  World War II is generally considered to have begun on 1 September 1939, when Nazi Germany, under Adolf Hitler, invaded Poland. The United Kingdom and France subsequently declared war on Germany on the 3rd. Under the Molotov–Ribbentrop Pact of August 1939, Germany and the Soviet Union had partitioned Poland and marked out their "spheres of influence" across Finland, Romania and the Baltic states. From late 1939 to early 1941, in a series of campaigns and treaties, Germany conquered or controlled much of continental Europe, and formed the Axis alliance with Italy and Japan (along with other countries later on). Following the onset of campaigns in North Africa and East 
Title: Adolf Hitler
Content:  expanded to include Hungary, Romania, and Bulgaria, thus yielding the Axis powers. Hitler's attempt to integrate the Soviet Union into the anti-British bloc failed after inconclusive talks between Hitler and Molotov in Berlin in November, and he ordered preparations for the invasion of the Soviet Union.  In early 1941, German forces were deployed to North Africa, the Balkans, and the Middle East. In February, German forces arrived in Libya to bolster the Italian presence. In April, Hitler launched the invasion of Yugoslavia, quickly followed by the invasion of Greece. In May, German forces were sent to support Iraqi forces fighting against the British and to invade Crete.
Title: Adolf Hitler
Content:  in Europe. He directed large-scale rearmament and, on 1 September 1939, invaded Poland, resulting in Britain and France declaring war on Germany. In June 1941, Hitler ordered an invasion of the Soviet Union. By the end of 1941, German forces and the European Axis powers occupied most of Europe and North Africa. These gains were gradually reversed after 1941, and in 1945 the Allied armies defeated the German army. On 29 April 1945, he married his longtime lover Eva Braun in the Führerbunker in Berlin. Less than two days later, the couple committed suicide to avoid capture by the Soviet Red Army. Their corpses were burned. Historian and 
Title: Adolf Hitler
Content:  inaction. On 1 September 1939, Germany invaded western Poland under the pretext of having been denied claims to the Free City of Danzig and the right to extraterritorial roads across the Polish Corridor, which Germany had ceded under the Versailles Treaty. In response, Britain and France declared war on Germany on 3 September, surprising Hitler and prompting him to angrily ask Ribbentrop, "Now what?" France and Britain did not act on their declarations immediately, and on 17 September, Soviet forces invaded eastern Poland.  The fall of Poland was followed by what contemporary journalists dubbed the "Phoney War" or Sitzkrieg ("sitting war"). Hitler instructed the two newly appointed 
Title: Adolf Hitler
Content:  Adolf Hitler (20 April 188930 April 1945) was an Austrian-born German politician who was the dictator of Germany from 1933 until his death in 1945. He rose to power as the leader of the Nazi Party, becoming the chancellor in 1933 and then assuming the title of Führer und Reichskanzler in 1934. During his dictatorship, he initiated World War II in Europe by invading Poland on 1 September 1939. He was closely involved in military operations throughout the war and was central to the perpetration of the Holocaust, the genocide of about six million Jews and millions of other victims. Hitler was born in Austria, then part of 
Title: Timeline of World War II (1941)
Content:  older "United States Army Air Corps" designation. 22: Germany invades the Soviet Union with Operation Barbarossa, a three-pronged operation aimed at Leningrad, Moscow, and the southern oil fields of the Caucasus, ending the Molotov–Ribbentrop Pact. Romania invades south-western border areas of the Soviet Union in Europe on the side of Germany. : British general in Libya/Egypt Wavell is replaced by General Auchinleck. : June Uprising against the Soviet Union in Lithuania. ; 23: In the late evening, Hitler first arrives at his headquarters at Rastenburg, East Prussia, codenamed "Wolf's Lair" (Wolfsschanze). Between this date and November 20, 1944, Hitler will have spent 800 days at Wolf's Lair. : German troops massacre 42 at Ablinga. ; 24: German forces enter 

Question: what country did hitler invade that started ww2?
Answer: Hitler Declares War on Poland.