<Li> 1536--Gonzalo Pizarro steals Manco Inca's wife, Cura Olcollo . Manco rebels and surrounds Cuzco . Juan Pizarro is killed, and Inca general Quizo Yupanqui attacks Lima </Li> <Li> 1537--Almagro seizes Cuzco from Hernando and Gonzalo Pizarro . Rodrigo Orgóñez sacks Vitcos and captures Manco Inca's son, Titu Cusi . Manco escapes and flees to Vilcabamba, which became the capital of the Neo-Inca State </Li> <Li> 1538--Hernando Pizarro executes Diego de Almagro </Li> <Li> 1539--Gonzalo Pizarro invades and sacks Vilcabamba; Manco Inca escapes but Francisco Pizarro executes Manco's wife, Cura Olcollo </Li>

Name three reasons why the spanish were able to overthrow the inca army