Complex sentence: During the Battle of Cana, the Seleucid king Antiochus XII waged war against the Nabataeans and the king himself was slain during combat while his demoralized army fled and perished in the desert from starvation.
Split into simpler sentences: During the Battle of Cana, the Seleucid king Antiochus XII waged war against the Nabataeans and the king himself was slain during combat. His demoralized army fled and perished in the desert from starvation.