| YEAR | DATE | EVENT | HEAD OF STATE | PRIME MINISTER | HIGH COMMISSIONER | 
| 1921 | 23 august | Kingdom under UK protectorate | king Faysal I | Sayyid `Abd ar-Rahman al-Haydari al-Kaylani | Sir Percy Zachariah Cox | 
| 1922 | 20 november |  |  | `Abd al-Muhsin Bey as-Sa`dun (I) |  | 
| 1923 | 4 may |  |  |  | Sir Henry Robert Conway Dobbs | 
| 1923 | 22 november |  |  | Jaafar Pasha al-Askari  (I) |  | 
| 1924 | 2 august |  |  | Yasin Pasha al-Hashimi (I) |  | 
| 1925 | 26 november |  |  | Abd al-Muhsin Bey as-Sa`dun (II) |  | 
| 1926 | 21 november |  |  | Jaafar Pasha al-Askari (II) |  | 
| 1928 | 11 january |  |  | `Abd al-Muhsin Bey as-Sa`dun (III) |  | 
| 1928 | october |  |  |  | Sir Gilbert Falkingham Clayton | 
| 1929 | 28 april |  |  | Sulayman Tawfiq Bey as-Suwaydi (I) |  | 
| 1929 | 19 september |  |  | Abd al-Muhsin Bey as-Sa`dun (IV) |  | 
| 1929 | 3 october |  |  |  | Sir Francis Humphrys | 
| 1929 | 18 november |  |  | Ibrahim Naji Bey as-Suwaydi |  | 
| 1930 | 23 march |  |  | Nuri Pasha as-Said (I) |  |