In December 1922 Percy Cox, British High Commissioner in the British Mandate of Iraq, met with Ibn Saud and signed the Uqair Protocol, which finalized Saudi Arabia’s border with both Kuwait and Iraq.

Uqair Protocol of 1922

The Uqair Protocol or Uqair Convention was an agreement at Uqair on 2 December 1922 which defined the boundaries between Mandatory Iraq and the Sultanate of Nejd and Sheikhdom of Kuwait between Kuwait and Nejd. It was imposed by Percy Cox, the British High Commissioner to Iraq, in response to Bedouin raiders from Nejd under ibn Saud. Cox met ibn Saud and Major John More, the British Political Agent to Kuwait. The boundaries included a Saudi–Iraqi neutral zone and a Saudi–Kuwaiti neutral zone.
Kuwait was not permitted any role in outcome of the Uqair agreement when the Saudis and British decided Kuwait’s modern boundaries. Kuwait lost more than two thirds of its territory as a result of the agreement and anti-British sentiment grew in Kuwait due to the loss of territory.