Answer: The Yuezhi invaded the Greco-Bactrian kingdom around 135 BCE, displacing the Greek dynasties. Kushan control fragmented into semi-independent kingdoms as the Sassanians attacked from the west and the Guptas attacked from the east, collapsing the Kushan Empire around 375 CE.
Explanation:
The Kushans spread from the Kabul River Valley to defeat other Central Asian tribes. These conquests included parts of the northern central Iranian Plateau, once ruled by the Parthian Empire—a major political and cultural power in ancient Iran and Iraq.
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Answer:
There were very few beavers left in Europe, so demand for their fur was very high.
Explanation:
Beavers are common in North America, but they aren't common in Europe. Therefore, their fur would be much more valuable in Europe than in North America.
Produced the steam engines which then improved systems of transportation. For example, trains were essential, but relied on burning coal. The steam engine made it more efficient. For the textile industry, the sewing machine was introduced to production lines, helping the processing and usage of cotton to be more efficient.
