When the British surveyed British Guiana in 1840, they included the entire Cuyuni River basin within the colony. Venezuela did not agree with this as it claimed all lands west of the Essequibo River. In 1898, at Venezuela's request, an international arbitration tribunal was convened, and in 1899 the tribunal issued an award giving about 94% of the disputed territory to British Guiana. The arbitration was concluded, settled and accepted into International law by both Venezuela and the U.K. Venezuela brought up again the settled claim, during the 1960s cold war period, and during Guyana's Independence period. This issue is now governed by the Treaty of Geneva of 1966, which was signed by the Governments of Guyana, Great Britain and Venezuela, and Venezuela continues to claim Guayana Esequiba. Venezuela calls this region "Zona en Reclamación" (Reclamation Zone) and Venezuelan maps of the national territory routinely include it, drawing it in with dashed lines.