Anglo-Scottish border English king, Edgar the Peaceful, at his council in Chester. After Kenneth had reportedly done homage, Edgar rewarded Kenneth by granting him Lothian. Despite this transaction, the control of Lothian was not finally settled and the region was taken by the Scots at the Battle of Carham in 1018 and the River Tweed became the "de facto" Anglo-Scottish border. The Solway–Tweed line was legally established in 1237 by the Treaty of York between England and Scotland. It remains the border today, with the exception of the Debatable Lands, north of Carlisle, and a small area around Berwick-upon-Tweed, which was taken
Yarmouk River Valley, forms part of the border between Israel and Jordan. Further upstream it forms part of the border between Syria and Jordan (a border largely inherited from the 1923 Franco-British Boundary Agreement). The area of Al-Hamma, or Hamat Gader in the valley is held by Israel but claimed by Syria. The Al-Wehda Dam was constructed in Jordan and Syria in the 2000s. There are political agreements between Jordan and Syrian (1953 and 1987) and between Jordan and Israel (1994), about the management and allocation of the shared waters of the Yarmouk River. Yarmouk River The Yarmuk River (, , or