Complex sentence: Operations against Newport were planned to be made in conjunction with a French fleet and troops but were frustrated in part by difficult relations between the commanders, as well as by a storm that damaged both French and British fleets shortly before joint operations were to begin.
Split into simpler sentences: Operations against Newport were said to have been made in conjunction with a French fleet and troops. The operations were frustrated in part by difficult relations between the commanders as well as a storm that damaged both French and British fleets shortly before joint operations were to begin.