Answer:
Germany's militarization of the Rhineland, annexation of Austria, and aggression against Czechoslovakia, the Stalin-Hitler Pact of 1939, and the German attack on Poland. Like Italy and Japan, German aggression came from a need for resources, a desire to expand or gain back former land, and extreme nationalism.
Turning a draft budget into spending bill. [apex]
Slavery was incredibly divisive because the Us was expanding into the west, and each new state had to decide whether it was going to be "slave" or "free", so there was no middle ground in terms of how the extension of slavery would unfold. This led to the Civil War.