Create a brief timeline including 5-7 actions of hitler before he attacked poland.

The Nazi's invaded Poland on September 1, 1939.  Hitler and the Nazi's wanted to expand for "living space" for the German people.  Hitler started the German expansion in 1938 with the union with Austria and then the invasion of Sudentenland and Czechoslovakia. 

3/12/38: Germany and Austria form Union
10/15/38: Germany occupies Sudentenland
3/15/39: Nazi's take over Czechoslovakia
5/22/39: Nazi's sign  "Pact of Steel" with Italy
8/23/39: Nazi's sign a pact with the Soviets
9/1/39: Nazi's invade Poland

Yes you are cute answer theories to explain the colonization of the new world the last great habitable landmass to be occupied by humans focus on the bering land bridge, or beringia, which emerge by siberia and alaska the last ice age.