It used oligarchy, rule by a few.
Uprisings or move to another place with fertile soil
The direct cause of WWI was the assassination of Archduke Franz Ferdinand at Sarajevo on 28 June 1914.
The Eisenhower era ,benefiting from the war economy was a period of prosperity. In his rule, America saw a period of peace, increased GDP, and prosperity of the masses. Almost every American was able to own a car. In addition, the infrastructure of the country was rapidly developed leading to emergence of suburbs.
Answer:
North Vietnam attacked a US warship
Explanation: