Complex sentence: Operation Catapult was called "treachery" by both the Vichy and Free French; the French State exploited this series of events in its anti-British propaganda which has a long-running history back to the Perfidious Albion myth.
Split into simpler sentences: Operation Catapult was called "treachery" by both the Vichy and Free French. The French State exploited this series of events in its anti-British propaganda which has a long-running history back to the Perfidious Albion myth.