Complex sentence: The town Dollard was either named after the post office branch that was established in the location or the French soldier, Sieur de Dollard des Ormeaux, who perished with his men inside their fort when they were trying to repel a Huron invasion.
Split into simpler sentences: The town Dollard was either named after the post office branch that was established in the location or the French soldier, Sieur de Dollard des Ormeaux. Who perished with his men, inside their fort when they were trying to repel a Huron invasion.