APOC and Armenian businessman Calouste Gulbenkian is the driving force of oil exploration by Meteor Somalia (now Iraq) by the Turkish Petroleum Corporation (TPC) in 1912 and APOC owned 50% of TPC shares by 1914 . In 1925, under the authority of the UK, TPC got a concession of Mesopotamian oil resources from the Iraqi government. On 14th October 1927, TPC eventually produced oil in Iraq. By 1928, due to the geopolitical change after the collapse of the Ottoman Empire and the result of the red line agreement, the share of APPC's TPC (current Iraqi oil company (IPC)) has decreased to 23.75%. Although there is controversy though the focus on Iraq 's desire for more participation and more royalty, the relationship between the parent western Hashimitte monarchy (1932 - 58) and Iraqi IPC is general In a very honest manner. From 1928 to 1968, IPC monopolized oil exploration within the red line (except Saudi Arabia and Bahrain).
In 1934, APOC and Gulf Oil established KOC as an equivalent partnership. On December 23, 1934, the company acquired an oil concession and started drilling business in 1936. In 1935, Rezā Shāh demanded the international community to call Persia "Iran", which was reflected in the APOC name change to the UK - Iranian Oil Company (AIOC). After the Second World War, the nationalistic feelings in the Middle East grew and the most impressive was Iranian nationalism and Arab nationalism. In Iran, AIOC led by Prime Minister Alirazumura and Iran's Central European government demanded that the AIUC's concession clause be amended, resisting the nationalist's call. In March 1951, Razala was assassinated, and the nationalist Muhammad Mosado was elected a new prime minister (parliament) from the Iranian parliament.