Siege of Baghdad in the context of "Ottoman Caliphate"

Iraq, officially the Republic of Iraq, is a country in West Asia. Located within the geo-political region of the Middle East, it is bordered by Saudi Arabia to the south, Turkey to the north, Iran to the east, the Persian Gulf and Kuwait to the southeast, Jordan to the southwest, and Syria to the west. The country covers an area of 438,317 square kilometres (169,235 sq mi) and has a population of over 46 million, making it the 58th largest country by area and the 31st most populous in the world. Baghdad, home to over 8 million people, is the capital city and the largest in the country.

Starting in the 6th millennium BC, the fertile plains between Iraq's Tigris and Euphrates rivers, referred to as Mesopotamia, fostered the rise of early cities, civilisations, and empires including Sumer, Akkad, Babylonia, and Assyria. Known as the cradle of civilisation, Mesopotamia saw the invention of writing systems, mathematics, navigation, timekeeping, a calendar, astrology, the wheel, the sailboat, and a law code. After the Muslim conquest of Mesopotamia, Baghdad became the capital of the Abbasid Caliphate and a global cultural and intellectual hub during the Islamic Golden Age, home to institutions such as the House of Wisdom. Following Baghdad's destruction by the Mongols in 1258, Iraq came under successive empires and, from the 16th century until the 20th century, was governed within the Ottoman system as a defined region known administratively as ‘the Iraq Region’. Additionally, Iraq holds religious significance in Christianity, Judaism, Yazidism, and Mandaeism.

The Islamic Golden Age was a period of scientific, economic, and cultural flourishing in the history of Islam, traditionally dated from the 8th century to the 13th century.

This period is traditionally understood to have begun during the reign of the Abbasid caliph Harun al-Rashid (786 to 809) with the inauguration of the House of Wisdom, which saw scholars from all over the Muslim world flock to Baghdad, the world's largest city at the time, to translate the known world's classical knowledge into Arabic and Persian. The period is traditionally said to have ended with the collapse of the Abbasid caliphate due to Mongol invasions and the siege of Baghdad in 1258.

The Battle of Ain Jalut (Arabic: معركة عين جالوت, romanized: Ma'rakat ‘Ayn Jālūt), also spelled Ayn Jalut, was fought between the Bahri Mamluks of Egypt and the Ilkhanate on 3 September 1260 (25 Ramadan 658 AH) near the spring of Ain Jalut in southeastern Galilee in the Jezreel Valley. It marks as the first major loss of the Mongolian advances and halted their expansion into Arabia and Europe.

Continuing the westward expansion of the Ilkhanate, the armies of Hulegu Khan captured and sacked Baghdad in 1258, along with the Ayyubid capital of Damascus sometime later. Hulegu sent envoys to Cairo demanding Qutuz surrender Egypt, to which Qutuz responded by killing the envoys and displaying their heads on the Bab Zuweila gate of Cairo. Shortly after this, Möngke Khan was slain in battle against the Southern Song. Hulegu returned to Mongolia with the bulk of his army to attend the kurultai in accordance with Mongol customs, leaving approximately 10,000 troops west of the Euphrates under the command of Kitbuqa.

The Berke–Hulegu war was fought between two Mongol leaders, Berke Khan of the Golden Horde and Hulegu Khan of the Ilkhanate. It was fought mostly in the Caucasus Mountains area in the 1260s after the destruction of Baghdad in 1258. The war overlaps with the Toluid Civil War in the Mongol Empire between two members of the Tolui family line, Kublai Khan and Ariq Böke, who both claimed the title of Great Khan (Khagan). Kublai allied with Hulegu, while Ariq Böke sided with Berke. Hulegu headed to Mongolia for the election of a new Khagan to succeed Möngke Khan, but the loss of the Battle of Ain Jalut to the Mamluks forced him to withdraw back to the Middle East. The Mamluk victory emboldened Berke to invade the Ilkhanate. The Berke–Hulegu war and the Toluid Civil War as well as the subsequent Kaidu–Kublai war marked a key moment in the fragmentation of the Mongol empire after the death of Möngke, the fourth khan of the Mongol Empire.

Mongol Armenia or Ilkhanid Armenia refers to the period beginning in the early-to-mid 13th century during which both Zakarid Armenia and the Armenian Kingdom of Cilicia became tributary and vassal to the Mongol Empire and the successor Ilkhanate. Armenia and Cilicia remained under Mongol influence until around 1335.

During the time period of the later Crusades (1250s to 1260s), there was a short-lived Armenian-Mongol alliance, engaged in some combined military operations against their common enemy, the Mamluks. They succeeded in the Siege of Baghdad, but suffered defeat eight years later.