Complex sentence: He left Britain to live in France after going bankrupt in the early 1930s, and in Paris he met the French fascist leader Jacques Doriot, with whom he travelled to Austria, Czechoslovakia, Italy and Germany to witness the effects of fascism in those countries.
Split into simpler sentences: He left Britain to live in France after going bankrupt in the early 1930s. In Paris he met the French fascist leader Jacques Doriot, with whom he traveled to Austria, Czechoslovakia, Italy and Germany to witness the effects of fascism in those countries.