evidence: Hala’ib, Bir Tawil, and Wadi Halfa: Egypt; Sudan The boundary dispute between Egypt and Sudan results from claims along differing colonial administration lines. The dispute involves three areas. The Hala’ib triangle and the Wadi Halfa salient are controlled by Egypt and claimed by Sudan. Bir Tawil, though it is de facto part of Sudan, lies between their opposed claim lines.