The Treaty of Versailles stated (to name a few) that Germany had to have a small army/navy/air force and couldn't try to expand their empire by taking over other countries, Hitler did this anyway, sparking WW2.
Great Britain and the original 13 British colonies in North America<span>. </span>
It was really important to them and they thought that all land to the west of it shouldn't be owned by settlers
They were forced to move B.