Complex sentence: In the years after World War I, the high prices enjoyed during the war fell with the resumption of international trade, and farmers became increasingly discontented with the fixed prices paid by the compulsory marketing authorities set up as a wartime measure by the Hughes government.
Split into simpler sentences: In the years after World War I, the high prices enjoyed during the war fell with the resumption of international trade. Farmers became increasingly discontented with the fixed prices paid by the compulsory marketing authorities set up as a wartime measure by the Hughes government.