Complex sentence: On the night of 9/10 June, the 352nd Division received permission to retire to Saint-Lô, which created a gap in the German lines near Caumont-l'Éventé.
Split into simpler sentences: On the night of 9/10 June, the 352nd Division received permission to retire to Saint-Lô. The withdrawal created a gap in the German lines near Caumont-l'Éventé.