Answer: A confederation.
Explanation:
A confederation is the union of various states that unite for a specific purpose and delegate the powder to a central government. Confederations are often created in critical situations to make faster decisions intergovernmental.
For example, in America, the original 13 states signed the "<em>Articles of Confederation</em>" which are considered the first constitution of the republic, it was created to unite the 13 states and claim independence from England.
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Harlem Renaissance, started a revolution within the African american society. It was a domino effect leading to more acceptance of black culture.
The part of China that Japan invaded in 1931 was known as "Manchuria," and they did this mostly in order to gain precious natural resources that they greatly lacked.