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Who conquered Athens and Sparta?

Answer:
The Macedonians under Alexander the Great.

Alexander the Great was sixteen years old at this time. Although he commanded the Companion Cavalry at a critical moment of the battle which defeated Thebes, Sparta, Athens, and the rest, Alexander's father Philip commanded the Macedonian army.

First answer by HistoryDork. Last edit by Er3Jen. Contributor trust: 335 [recommend contributor recommended]. Question popularity: 2 [recommend question].