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Answer:
It all began when the Romans overthrew their Etruscan conquerors in 509 B.C.E. Centered north of Rome, the Etruscans had ruled over the Romans for hundreds of years. Once free, the Romans established a republic, a government in which citizens elected representatives to rule on their behalf.
Then the Great Roman Empire started its supports in its historic construction.
Source:
https://www.ushistory.org/civ/6a.asp
Federalism is the distribution of power between a central authority and constituent units, such as the federal government in Washington DC and the states. Article V of the constitution allows for the creation of constitutional amendments via an act of Congress, or by the application of a majority of the states. In this case, both the states and the central authority are able to make necessary changes without the consent of the other.
1.An astrolabe was an instrument which helped sailors to find their location by looking at the stars and sun
2. Crusaders were people who went on the Crusades
3. The feudal system was the social, economic, and political system of Europe in the Middle Ages
4. A manor was a large estate or farm, part of which was set aside for the lord and the rest divided among his peasants
5. The Middle Ages was the period in European history between ancient and modern times, from about A.D. 500 to about 1500
6. A Muslim is a believer in the religion of Islam; a follower of Mohammed
7. A serf was a peasant in the feudal system midway between a freeman and a slave
The Mississippian culture adopted the Mexican's the central ceremonial plaza building style.
The Mexico' central ceremonial plaza building style included the pyramidal and oval earth mounds design. The Mississippian culture spreads in the area that called Mississippi now. This culture is the last prehistoric development of culture in North America. This era began in the AD 700.