| The Encyclopedia of World History. 2001. |
| 192227 | |
| The Millspaugh mission, composed of American advisers, entrusted by Riza Khan with the fiscal reform of the government. | 1 |
| 1922, Dec. 12 | |
| Implementation of the first civil service code for government employees. | 2 |
| 1923 | |
| Introduction of a regular postal service. | 3 |
| Oct. 28 | |
| Riza Khan became prime minister. | 4 |
| The Encyclopedia of World History, Sixth edition. Peter N. Stearns, general editor. Copyright © 2001 by Houghton Mifflin Company. Maps by Mary Reilly, copyright © 2001 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. | |
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