Establishment of the Emirate of Transjordan in the context of "Arab Kingdom of Syria"

Jordan, officially the Hashemite Kingdom of Jordan, is a country in the Southern Levant region of West Asia. Jordan is bordered by Syria to the north, Iraq to the east, Saudi Arabia to the south, and both Israel and Palestine (West Bank) to the west. The Jordan River, flowing into the Dead Sea, is located along the country's western border within the Jordan Rift Valley. Jordan has a small coastline along the Red Sea in its southwest, separated by the Gulf of Aqaba from Egypt. Amman is the country's capital and largest city, as well as the most populous city in the Levant.

Inhabited by humans since the Paleolithic period, three kingdoms developed in Transjordan during the Iron Age: Ammon, Moab and Edom. In the third century BC, the Arab Nabataeans established their kingdom centered in Petra. The Greco-Roman period saw the establishment of several cities in Transjordan that comprised the Decapolis. After the end of Byzantine rule, the region became part of the Islamic caliphates of the Rashidun, Umayyad, Abbasid, and the Ottoman. Following the 1916 Great Arab Revolt during World War I, former Ottoman Syria was partitioned, leading to the establishment of the Emirate of Transjordan in 1921, which became a British protectorate. In 1946, Jordan gained independence and became officially known as the Hashemite Kingdom of Jordan. Jordan captured and annexed the West Bank during the 1948 Palestine war until it was occupied by Israel in 1967. Jordan renounced its claim to the territory to the Palestinians in 1988 and signed a peace treaty with Israel in 1994.

The Interregnum (between rulers) period in Transjordan was a short period during which the region had no established ruler or occupying power that lasted from the end of the Franco-Syrian War on 25 July 1920 until the establishment of the Emirate of Transjordan on 11 April 1921.

Transjordan was in the British sphere of influence, but the British did not send an army or administration, and the government of the Hashemite Arab Kingdom of Syria under Prince Faisal had collapsed after being defeated by the French during the Battle of Maysalun in July 1920. British High Commissioner for Palestine Herbert Samuel wrote that the area was "left politically derelict"; the region was extremely poor, sparsely populated, and widely considered ungovernable.

The Sharifian or Sherifian Solution (Arabic: الحلول الشريفية) was an informal name for post-Ottoman British Middle East policy and French Middle East policy of nation-building. At first put forward by T. E. Lawrence in 1918, it was a plan to install the three younger sons of Hussein bin Ali al-Hashimi (the Sharif of Mecca and King of Hejaz) as heads of state in newly created countries across the Middle East, whereby his second son Abdullah would rule Baghdad and Lower Mesopotamia, his third son Faisal would rule Syria, and his fourth son Zeid would rule Upper Mesopotamia. Hussein himself would not wield any political power in these places, and his first son, Ali would be his successor in Hejaz.

Given the need to rein in expenditure and factors outside British control, including France's removing of Faisal from Syria in July 1920, and Abdullah's entry into Transjordan (which had been the southern part of Faisal's Syria) in November 1920, the eventual Sharifian solution was somewhat different, the informal name for a British policy put into effect by Secretary of State for the Colonies Winston Churchill following the 1921 Cairo conference. Faisal and Abdullah would rule Iraq and Transjordan respectively; Zeid did not have a role, and ultimately it proved impossible to make satisfactory arrangements with Hussein and the Kingdom of Hejaz. An underlying idea was that pressure might be applied in one state to secure obedience in another; as it transpired, the inherent assumption of family unity was misconceived.