Final answer:
The slave rebellion in Iraq, known as the Zanj Rebellion, had a significant impact on the slave trade in the Islamic empire, effectively diminishing it.
Step-by-step explanation:
The slave rebellion in Iraq had a significant impact on the slave trade in the Islamic empire. The rebellion, known as the Zanj Rebellion, began in 868 when enslaved people called Zanj rebelled against their enslavers in the region. Although the rebellion was eventually crushed in 883, it effectively ended much of the large-scale slave trade between the Swahili coast and the Persian Gulf in this period. As a result, the slave trade diminished in the Islamic empire.