Complex sentence: He left France in September 1944 as the German armies withdrew, this despite claiming to Swedish ambassador Raoul Nordling on the seventh of the previous month that the Germans had neither killed political prisoners nor were making any plans to leave Paris.
Split into simpler sentences: He left France in September 1944 as the German armies withdrew. This despite claiming to Swedish ambassador Raoul Nordling on the seventh of the previous month that the Germans had neither killed political prisoners nor were making any plans to leave Paris.