Complex sentence: Classical Greeks would often claim that Caria was originally colonized by Ionian Greeks, but Homer suggests that they were indigenous, and recorded that they were allied with Troy (Iliad, 2.865).
Split into simpler sentences: Classical Greeks would often claim that Caria was originally colonized by Ionian Greeks, but it seems rather that the Carians were settled in the region before the Greeks. Homer recorded that they were allied with Troy (Iliad, 2.865).