Complex sentence: Due to the Anglo-American advances from Gold and Omaha Beachs, the German 352nd Infantry Division began to buckle; as it withdrew south, it opened up a wide gap in the German lines near Caumont-l'Éventé.
Split into simpler sentences: Due to the Anglo-American advance south, from Gold and Omaha Beachs, the German German 352nd Infantry Division began to buckle. At the division withdrew south, it opened up a wide gap in the frontline near Caumont-l'Éventé.