A Roman legion (from Latin legio "military levy, conscription", from legere "to choose") normally indicates the basic ancient Roman army unit recruited specifically from Roman citizens. In reference to the early Roman Kingdom (as opposed to the Roman Republic or Empire), "the legion" means the entire Roman army.
I would have to say A) Lewis and Clarke expedition because Lewis and Clarke did explore the Louisiana Territory, The Treaty of Greenville happened before the purchase, and the other 2 had different causes.
Hello!
The answer you are looking for is China and India.
Hope this helps!
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