Mesopotamia has been settled for at least 12,000 years. Between the 10th and 12th centuries Baghdad was capital of the Muslim world. The city’s destruction and the ravaging of the countryside by the Mongols was followed by slow decline. The arrival of the Ottomans in Baghdad in the 16th century halted the rivalries between Shias and Sunnis and established the triumph of Sunnism. They governed what is present-day Iraq as five provinces, consolidating them to three, with governorships based in Mosul, Baghdad and Basra.

There were tribal revolts, incursions from Arabia and attempts at administrative reform. Yet the Turks kept a tight grip on the provinces, challenged only at the start of the First World War when an Anglo-Indian expeditionary force occupied Basra.

The British did not reach Baghdad until 1917; Mosul, in the north, was in Turkish hands until the armistice. Under a secret Anglo-French agreement (Sykes-Picot), Iraq became a British mandate, and the three provinces were merged into a single political entity with Faisal, the son of Sherif Hussein of Mecca, established as King in 1921. The borders were defined partly by the orientalist Gertrude Bell, but Britain had only shaky political control.

After clashes with nationalists, Britain declared an end to the mandate in 1930, and Iraq became formally independent in 1932. There were still uprisings, however, and military force was used to put down the Assyrians and other groups. When war broke out in 1939, Iraq’s Government was pro-Axis, and British forces were landed to overthrow the Prime Minister.

Modern Iraq emerged from the Second World War largely unscathed, and the British withdrew. It was theoretically a constitutional democracy, and was dominated by the pro-Western Prime Minister Nuri es-Said. But in 1958, in the upsurge of Arab nationalism, he was ousted in a coup organised by General Abdul Karim Kassem, and King Faisal II was killed.

Kassem was himself killed in a coup in 1963 that brought the Baathists to power. Several military coups followed, and a young Saddam Hussein made his bid for power.

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