Complex sentence: Tomás Manrique had to flee his home town with his wife Josefina and his son Pedrito the night an armed group unexpectedly barged in a party, killing every male they found to be in the opposite political party.
Split into simpler sentences: Tomás Manrique had to flee his home town with his wife Josefina and his son Pedrito. During the night, an armed group unexpectedly barged in a party killing every male they found to be in the opposite political party.