There have been 20 presidents since 1900
David Irving was acquitted of Holocaust denial.
True.
It brought them harm because they expected Hitler to be satisfied and they believed that if they gave him what he wanted that he wouldn't cause a new war and wouldn't bother them. This is why they didn't prepare for what he did when he started the war and why France was defeated so fast and couldn't do anything about it and why England became locked out of Europe completely until the arrival of the Allies.
Answer:
In summer of 1919 it ended because eventually everyone who was infected either died or developed immunity
Explanation:
