Complex sentence: On 15 August, German Askari forces stationed in the Rwanda-Burundi region shelled some frontier settlements in the Belgian Congo and on 22 August, a German naval vessel on Lake Tanganyika opened fire on Belgian shipping in the harbor of Albertville (now Kalemie).
Split into simpler sentences: On 15 August, German troops stationed in the Rwanda-Burundi region shelled some villages in the Belgian Congo. On 22 August, a German naval vessel on Lake Tanganyika opened fire on the harbor of Albertville (now Kalemie).