Saudi Arabian–Kuwaiti neutral zone

The Saudi Arabian–Kuwaiti neutral zone, also known as the Divided Zone, was an area of 5,770 km2 (2,230 sq mi) between the borders of Saudi Arabia and Kuwait that was left undefined when the border was established by the Uqair Convention of 2 December 1922. According to historian Daniel Yergin, "The Neutral Zone was the two thousand or so square miles of barren desert that had been carved out by the British in 1922 in the course of drawing a border between Kuwait and Saudi Arabia.

Source: Wikipedia — Saudi Arabian–Kuwaiti neutral zone (CC BY-SA 4.0)