Complex sentence: The French decisively defeated the English at the Battle of Taillebourg and concluded the struggle at the Siege of Saintes, but because of dynastic sensibilities and the desire to go on a crusade, Louis did not annex Guyenne.
Split into simpler sentences: The French decisively defeated the English at the Battle of Taillebourg and concluded the struggle at the Siege of Saintes. Because of dynastic sensibilities and the desire to go on a crusade, Louis did not annex Guyenne.