The Incas began by enlarging their hold beyond the immediate valley of Cusco. By 1350, during the reign of Inca Roca, they
had conquered all areas close to Lake Titicaca in the south as WELL as the valleys to the immediate east of Cusco. To the north
and east the region around the Upper Urubamba River also soon fell to the Incas, and their realm then began to spread
westward.