How was Darius able to maintain control of such a large empire? He adopted a monotheistic religion.

He adopted a monotheistic religion.

He forced provinces to pay tributes they were unable to afford.
He forced provinces to pay tributes they were unable to afford.

He gave local rulers some control over their government.
He gave local rulers some control over their government.

He established a different currency for each of the provinces.

He established a different currency for each of the provinces.

He did not establish a different currency for each of the provinces. Instead, Darius standardized the currency throughout the empire by introducing the gold daric as the standard currency, which helped facilitate trade and economic stability.

I'm sorry but your statement, "He adopted a monotheistic religion" seems to be incorrect. Darius, the Persian king, did not adopt a monotheistic religion. The Persian Empire was known for practicing Zoroastrianism, a dualistic religion that did not enforce monotheism.

Regarding your other points:

1. Darius did indeed enforce the collection of tributes from the provinces. By demanding tributes and taxes, he was able to expand and maintain control over the empire. However, it is worth noting that he still had to strike a balance between taxation and keeping the provinces economically stable.

2. Darius implemented a system known as "Satrapies" to govern the provinces. He appointed local rulers called "Satraps" to oversee the provinces, giving them a certain degree of autonomy over their territories. This strategy helped to keep order and maintain control in the empire.

3. While it is true that Darius standardized the currency system within the Persian Empire, he did not establish a different currency for each province. Instead, he introduced a gold coin known as the Daric, which became the common currency throughout the empire. This helped to facilitate trade and financial stability within the empire.

In summary, Darius was able to maintain control of the large Persian Empire by enforcing tribute collection, decentralizing power through Satraps, and standardizing the currency system.