Complex sentence: In 1943, Detroit's population had grown by 350,000 people since the beginning of World War II. The booming defense industries brought in large numbers of people with high wages and very little available housing.
Split into simpler sentences: In 1943, Detroit's population had grown by 350,000 people since the war began. Sitkoff, "The Detroit Race Riot 1943" The booming defense industries brought in large numbers of people with high wages and very little available housing.