Complex sentence: Among the French soldiers killed was the organist and composer Jehan Alain he was assigned to reconnoitre the German advance on the eastern side of Saumur and encountered a group of Wehrmacht soldiers at Le Petit-Puy.
Split into simpler sentences: Among the French soldiers killed was the organist and composer Jehan Alain. He was assigned to reconnoitre the German advance on the eastern side of Saumur and encountered a group of Wehrmacht soldiers at Le Petit-Puy.