Complex sentence: According to contemporary estimations, Verdun resulted in 714,321 casualties, 377,231 on the French side and 337,000 on the German one, an average of 70,000 casualties for each of the ten months of the battle.
Split into simpler sentences: According to contemporary estimations, Verdun resulted in 714,321 casualties, 377,231 on the French side and 337,000 on the German one. An average of 70,000 casualties for each of the ten months of the battle.