Following the Kuwait–Najd War of 1919-1920, Ibn Saud imposed a tight trade blockade against Kuwait from the years 1923 until 1937.[70][73] The goal of the Saudi economic and military attacks on Kuwait was to annex as much of Kuwait's territory as possible.[70] At the Uqair conference in 1922, the boundaries of Kuwait and Najd were set.[70] Kuwait had no representative at the Uqair conference.[70] Ibn Saud persuaded Sir Percy Cox to give him two-thirds of Kuwait's territory.[70] More than half of Kuwait was lost due to Uqair.[70] After the Uqair conference, Kuwait was still subjected to a Saudi economic blockade and intermittent Saudi raiding.[70]