Complex sentence: Later on, the town ran the risk of being completely swept away, having declared it "infect area" the German troops, for fear of epidemics, were going to set it to fire by flame-throwers.
Split into simpler sentences: Later on, the town ran the risk of being completely swept away, having declared it "infect area". The German troops, for fear of epidemics, were going to set it to fire by flame-throwers.