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Answer:
Feudalism
Explanation:
The system defining hierarchical system based on land ownership, protection & mutual obligation : is called as Feudalism.
It emerged in ancient history of Europe.
It consists of nobility class (land owners), known as 'lords'. They recompense knights, vessels & serfs - by granting them piece of land (called fiefdoms) return of which the latter fight for the former.
Answer:
World War I began in 1914 after the assassination of Archduke Franz Ferdinand and lasted until 1918. During the conflict, Germany, Austria-Hungary, Bulgaria and the Ottoman Empire (the Central Powers) fought against Great Britain, France, Russia, Italy, Romania, Japan and the United States (the Allied Powers). it was concluded by the treatment of versatile in 1918.
Explanation:
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It was important to ignore the fears and rules that schools should not be segregated because back then, people thought blacks' were nothing and they treated them like dirt. Back then, black people were not allowed to learn with whites' because of social class