Thebes in Egypt is famous because it was the capitol of Ancient
Egypt during the New Kingdom.
Thebes in Greece is famous because it was a major power during
the period of the city-states. It was a major rival of Athens,
sided with the Persians during Xerxes' invasion of Greece in 480
BC, and ended the power of Sparta at the Battle of Leuctra in 371
BC. Thebes was conquered and destroyed as a power by Phillip II of
Macedon and his son, Alexander the Great, in 335 BC after their
elite military group, the Sacred Band of Thebes, was destroyed in
338 BC.