Complex sentence: The Flagship was a large wild-cat themed galleon with many big cannons however by the time of the Baratie arc it had been badly damaged by battle and weather following its trip to the Grand Line.
Split into simpler sentences: The Flagship was a large wild-cat themed galleon with many big cannons. However, by the time of the Baratie arc it had been badly damaged by battle and weather following its trip to the Grand Line.