Complex sentence: Accused by naval officer, Lt. Clark Henry Wells of disloyal conduct and sentiments after the battle of Fredricksburg he was dismissed from the service that July for alleged disloyalty, Haller eventually returned to the American West and became prominent in Seattle business and industry.
Split into simpler sentences: Accused by naval officer Lt. Clark Henry Wells of disloyal conduct and sentiments after the Battle of Fredericksburg, Haller was dismissed from the service that July. He eventually returned to the American West and became prominent in Seattle business and industry.