Complex sentence: Christian retired with his troops towards the island of Käpplingen (today the Blasieholmen peninsula), however Sten's troops destroyed the makeshift bridge Christian's troops had built, causing many to drown.
Split into simpler sentences: Christian retired with his troops towards the island of Käpplingen (today the Blasieholmen peninsula). However, Sten's troops destroyed the makeshift bridge Christian's troops had built, causing many to drown.