Conversation so far:
what was a reform that was made by Umar?
Umar undertook many administrative reforms, establishing an advanced administration for the newly conquered lands, including several new ministries and bureaucracies, and ordered a census of all the Muslim territories.
were there any other reforms by Umar besides administrative reforms?
During Umar's rule, the garrison cities (amsar) of Basra and Kufa were founded or expanded.

Question: what other reforms did he make?
Self-contained rewrite: what other reforms did Umar make besides administrative reforms and expanding Basra and Kufa?