Will mark brainliest the us expanding to the land west of the original 13 colonies is known as a) western motion b) get up, go west! c) manifest destiny d) western trails a person who drills for oil in places not known for oil is known as a a) refinery worker b) scallywag c) digger d) wildcatter the two important things that caused the us to enter world war i were the sinking of the lusitania and the letter. a) screwtape b) zimmermann c) eisenhower d) lutenburg