Complex sentence: The 800 men of the first division landed at La Rocque, Grouville, and passed close by the guards without being noticed; a French officer even said that he had slept beneath the guards, but that the guards had not heard the French.
Split into simpler sentences: The 800 men of the first division landed at La Rocque, Grouville, and passed close by the guards without being noticed. A French officer even said that he had slept beneath the guards, but that the guards had not heard the French.