Step 1: Recall the year directly:
1793 A.D. marks: Permanent Settlement in Bengal.
Step 2: Provide brief context:
Lord Cornwallis introduced the Permanent Settlement (Zamindari System) of land revenue in Bengal in 1793, fixing revenue payments permanently and creating a class of zamindar landlords.
Final Answer:
\[ \boxed{\text{Permanent Settlement in Bengal}} \]