evidence: Treaty of Sugauli - The Nepalese kingdom had stretched from the Sutlej river in the west to the Teesta river in the East. [...] - The Sugauli Treaty stated that Nepal ceded to British the whole of the lowlands between the Rivers Kali and Rapti. [...] - By 2007, the Nepal-India Technical Level Joint Boundary Working Group agreed on 182 strip maps covering almost 98% of the boundary, except the two disputed areas of Kalapani and Susta.