Inca Yupanqui holds Cuzco against Chancas
When the Chanca army marched on Cuzco, the reigning Viracocha Inca and his designated heir Inca Urco abandoned the city for a fortified retreat. Viracocha's younger son, Inca Yupanqui, stayed with a small band of loyal companions, gathered allies, and defeated the Chancas in two battles. The victory made him the de facto ruler; he took the name Pachacuti ('turner of the world') and went on to rebuild Cuzco and launch the imperial expansion.
