Wadi al-Rummah in the context of "Buraidah"

Najd is a historical region of the Arabian Peninsula that includes most of the central region of Saudi Arabia. It is roughly bounded by the Hejaz region to the west, the Nafud desert in al-Jawf to the north, ad-Dahna Desert in al-Ahsa to the east, and Rub' al-Khali to the south, although its exact boundaries cannot be determined due to varying geographical and political limits throughout history.

Administratively, Najd is divided into three main regions: the Riyadh region which features Wadi Hanifa and the Tuwaiq escarpment, which houses easterly Yamama with the Saudi capital, Riyadh since 1824, and the Sudairi region, which has its capital in Majmaah. The second region, Al-Qassim, houses the fertile oases and date palm orchards spread out in the region's highlands along Wadi Rummah in central Najd with its capital in Buraidah, the second largest Najdi city, with the region historically contested by the House of Rashid to its north and the House of Saud to its east and south. The third administrative unit is northerly Ḥa'il, which features the mountains of Jabal Shammar housing the Tayy capital of Ḥa'il.

Hafar al-Batin (Arabic: حفر الباطن Ḥafar al-Bāṭin), also frequently spelled Hafr al-Batin, is a city in the Hafar al-Batin Governorate, Eastern Province, Saudi Arabia. It is located 430 km north of Riyadh, 94.2 km from the Kuwait border, and about 74.3 from the Iraq border. The city lies in the dry valley of the Wadi al-Batin, which is part of the longer valley of the river Wadi al-Rummah (now dry), which leads inland toward Medina and formerly emptied into the Persian Gulf.

Wadi al-Batin (وادي الباطن) is an intermittent river in Saudi Arabia, Iraq, and Kuwait. It is the lowest and final section of Wadi al-Rummah. It runs 45 mi (72 km) in a northeast–southwest direction through the Al-Dibdibah plain and has been recognized since 1913 as the border between Kuwait and Iraq.