The Inca emperor does not attack Cusco…
May 1536 CE
The Inca emperor does not attack Cusco at once; instead he waits to assemble his full army, estimated at between one hundred thousand to two hundred thousand men strong around the city (some sources suggest numbers as low as forty thousand); against them are one hundred and ninety Spaniards, eighty of them horsemen, and several thousand Indian auxiliaries.
The siege starts on May 6, 1536 with a full-scale attack towards the main square of the city; the Inca army succeeds in capturing most of the city while the Spaniards take refuge in two large buildings near the main plaza.
The conquistadors manage to fend off Inca attacks from these constructions and mount frequent raids against their besiegers.