Darius was able to maintain control of his large empire primarily through the following two strategies:
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He gave local rulers some control over their government. This allowed for local governance and loyalty while maintaining imperial oversight.
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He funded the construction of roads across his empire. This facilitated communication, trade, and military movement, helping to unify the diverse regions of his empire.
So, the correct answers are:
- He gave local rulers some control over their government.
- He funded the construction of roads across his empire.