Complex sentence: Diodorus, XIV.80.6-7 Ariaeus was ordered to assist, and he invited Tissaphernes to visit him at his residence in Colossae in Phrygia to discuss important business.
Split into simpler sentences: Diodorus, XIV.80.6-7 Ariaeus was ordered to assist. So Ariaeus invited Tissaphernes to visit him at his residence in Colossae in Phrygia to discuss important business.