Context: In the 18th century, the Moroccan Sultan Moulay Ismail "the Bloodthirsty" (1672–1727) raised a corps of 150,000 black slaves, called his Black Guard, who coerced the country into submission.

Question: When did Moroccan Sultan Moulay Ismail live?
Answer: (1672–1727)

Question: How many black slaves did he own?
Answer: 150,000

Question: What did he call his slave army?
Answer: Black Guard

Question: What did the Black Guard do?
Answer: coerced the country into submission.

Question: When did the Black Guard exist?
Answer: In the 18th century