Native americans in what is now mexico that settled in the valley of mexico around 1250. their empire was built across central and southern mexico. the transformed a deserted island in the middle of a lake into a major city called tenochtitlan, which becomes the hub of the empire. the aztecs build roads, bridges, and canals to carry goods to markets. they built a hug step pyramid over 150 feet high. their core religious practice was human sacrifice to the gods.

I think it is the Aztec, because the sentence and descriptions match up. Hope it helps!

arresting and exicuting citizens

the berlin blockade was an international crisis that arose from an attempt by the soviet union, in 1948–49, to force the western allied powers (the united states, the united kingdom, and france) to abandon their post-world war ii jurisdictions in west berlin. in march 1948 the allied powers decided to unite their different occupation zones of germany into a single economic unit. in protest, the soviet representative withdrew from the allied control council. coincident with the introduction of a new deutsche mark in west berlin (as throughout west germany), which the soviets regarded as a violation of agreements with the allies, the soviet occupation forces in eastern germany began a blockade of all rail, road, and water communications between berlin and the west. on june 24 the soviets announced that the four-power administration of berlin had ceased and that the allies no longer had any rights there.