Complex sentence: The fleet assembled in Kiel on 14 August for the annual autumn exercises: the maneuvers included a mock blockade of the coast of Mecklenburg and a pitched battle with an "Eastern Fleet" in the Danzig Bay.
Split into simpler sentences: The fleet assembled in Kiel on 14 August for the annual autumn exercises. The maneuvers included a mock blockade of the coast of Mecklenburg and a pitched battle with an "Eastern Fleet" in the Danzig Bay.