Complex sentence: Howley served as commandant of the American sector of Berlin immediately after World War II, when the city was broken and in dire need of being restored, and became known as "Howlin' Howley" because of his interminable and intractable interactions with the Soviets.
Split into simpler sentences: Howley served as commandant of the American sector of Berlin immediately after World War II, when the city was broken and in dire need of being restored. He became known as "Howlin' Howley" because of his interminable and intractable interactions with the Soviets.