Complex sentence: The troop burned cornfields and stole grain of the Navajo lands, killed and captured many Navajo, freed the Spanish and Pueblo who were prisoners of the Navajos, and destroyed other possessions.
Split into simpler sentences: The troop burned cornfields and stole grain of the Navajo lands. Also killed and captured many Navajo, freed the Spanish and Pueblo who were prisoners of the Navajos, and destroyed other possessions.