All the statements but the third one are correct.
Germany started World War II when it invaded Poland in 1939: The German invasion of Poland was a military action of Nazi Germany aimed at annexing the Polish territory. The technical operation, known as "White Case" (in German, Fall Weiss), began on September 1, 1939 and the last units of the Polish army surrendered on October 6 of that same year. It was the trigger of the Second World War in Europe and ended with the Second Polish Republic.
In the Battle of Britain, Germany used bombs to attack Great Britain: The Battle of Britain is the name by which the set of air battles fought in the British sky and on the English Channel is known, between July and October 1940, when Germany sought to destroy the Royal Air Force (RAF) to obtain the air superiority necessary for an invasion of Great Britain.
In the early stages of World War II, Germany demonstrated immense military power: The first German military movements were successful and brilliant, as in the blitzkrieg during the invasion of Poland (1939), Norway (1940), the Netherlands (1940), and above all, the incredibly rapid and successful invasion of France in the year 1940.
Poor whites and slaves thought that sharecropping would help them get more crops and land to provide for themselves, when it really only hurt them more because they got all the bad crops.
The lack of government oversight occurred in the housing market -- specifically in the home loan business. It's sometimes referred to as the "subprime mortgage" crisis. Subprime mortgages were mortgages given to borrowers that didn't qualify for a conventional loan. They would be financed in ways that charged borrowers higher interest because of the risk or had large balloon payments later in the loan period. As a result, there was a "housing bubble" created, where many people had entered into home loans above what they could pay. When that bubble burst and the housing market crashed, it triggered the great recession.
You might check out the book or the film called "The Big Short" for an interesting study of what happened!
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