Complex sentence: Tlacaelel incorporated the Toltec imperial ideology as part of the ruling ethos of the Mexica and married Aztec nobles to Toltec aristocrats from Cholula in order to provide his people with a distinguished lineage.
Split into simpler sentences: Tlacaelel incorporated the Toltec imperial ideology as part of the ruling ethos of the Mexica. He married Aztec nobles to Toltec aristocrats from Cholula in order to provide his people with a distinguished lineage.