Complex sentence: After commissioning she was assigned to the II Battle Squadron of the High Seas Fleet, where she served throughout the first two years of World War I. "Pommern" was present at the Battle of Jutland on 31 May--1 June 1916.
Split into simpler sentences: After commissioning she was assigned to the II Battle Squadron of the High Seas Fleet. She served with the fleet throughout the first two years of World War I. "Pommern" was present at the Battle of Jutland on 31 May--1 June 1916.