Complex sentence: Next day, parties of Germans at Beugny in the fought until nightfall then slipped away but a party at Vaulx Vraucourt was surprised (while some were shaving) and driven back to Lagnicourt.
Split into simpler sentences: Next day, parties of Germans at Beugny in the fought until nightfall then slipped away. A party at Vaulx Vraucourt was surprised (while some were shaving) and driven back to Lagnicourt.