This is called the Columbian Exchange: the exchange of species and populations between the Old and the New World, including some diseases, plants as tomato and potato and animals.
<span>The Night of the Long Knives, in June 1934, saw the wiping out of the SA’s leadership and others who had angered Hitler in the recent past in Nazi Germany. After this date, the SS lead by Heinrich Himmler was to become far more powerful in Nazi Germany.</span>
<span>For all the power the Enabling Act gave Hitler, he still felt threatened by some in the Nazi Party. He was also worried that the regular army had not given an oath of allegiance. Hitler knew that the army hierarchy held him in disdain as he was ‘only ‘ a corporal in their eyes. The Night of the Long Knives not only removed the SA leaders but also got Hitler the army’s oath that he so needed</span>
