Why did the us get involved in vietnam? question 2 options: the us signed a treaty with north vietnam that required them to come to their defense when they were invaded following the us foreign policy of containment and the domino theory the chinese invaded north vietnam and the us was concerned that it violated north vietnam’s sovereignty all of these

john maynard keynes developed new economic theories in response to the stock market crash of 1929. great depression of the 1930s. first and second world wars. economic boom of the 1950s.

the viking voyages took place during the middle ages, which was about this time. 500 to 1350. the viking voyages took place during the middle ages, which was about this time.