Complex sentence: In October 1598, a skirmish erupted when a squad of Oñate's men demanded supplies of Acoma Pueblo from the store that the Acoma themselves needed to survive the coming winter.
Split into simpler sentences: In October 1598, a skirmish erupted when a squad of Oñate's men demanded supplies from Acoma Pueblo. Trade had failed over provisions that the Acoma themselves needed to survive the oncoming winter.