After the Ottoman defeat in World War I, the Transjordan region was administered within OETA East; after British withdrawal this became the Hashemite-ruled Arab Kingdom of Syria, administering an area broadly comprising the areas of the modern countries of Syria and Jordan. Transjordan became a no man's land following the July 1920 Battle of Maysalun, during which period the British in neighbouring Mandatory Palestine chose to avoid "any definite connection between it and Palestine". Abdullah entered the region in November 1920, moving to Amman on 2 March 1921; later in the month a conference was held with the British during which it was agreed that Abdullah bin Hussein would administer the territory under the auspices of the British Mandate for Palestine with a fully autonomous governing system.