<Table> <Tr> <Th_colspan="2"> Siege of Tenochtitlan </Th> </Tr> <Tr> <Td_colspan="2"> Part of the Spanish conquest of the Aztec Empire </Td> </Tr> <Tr> <Td_colspan="2"> "Conquista de México por Cortés". Unknown artist, second half of the 17th century . Library of Congress, Washington, DC . The depiction of the Aztecs' clothing and weaponry is inaccurate . </Td> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Th> Date </Th> <Td> May 26--August 13, 1521 Julian Date (2 months, 2 weeks and 4 days) </Td> </Tr> <Tr> <Th> Location </Th> <Td> Tenochtitlan, present - day Mexico City, Mexico </Td> </Tr> <Tr> <Th> Result </Th> <Td> <P> Decisive Spanish and Tlaxcallan victory </P> <Ul> <Li> Fall of the Aztec Empire </Li> </Ul> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Th_colspan="2"> Belligerents </Th> </Tr> <Tr> <Td> Spanish Empire Confederacy of Tlaxcala Texcoco Otomis Xochimilco Mixquic Iztapalapa </Td> <Td> <P> Triple Alliance </P> <Ul> <Li> Tenochtitlan <Ul> <Li> Tlatelolco </Li> </Ul> </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Commanders and leaders </Th> </Tr> <Tr> <Td> Hernán Cortés Gonzalo de Sandoval Pedro de Alvarado Cristóbal de Olid Xicotencatl I Xicotencatl II </Td> <Td> Cuauhtémoc (POW) </Td> </Tr> <Tr> <Th_colspan="2"> Strength </Th> </Tr> <Tr> <Td> 16 guns 13 brigantines 80,000--200,000 native allies 90--100 cavalry 900--1,300 infantry </Td> <Td> 80,000--300,000 warriors (including war acallis) </Td> </Tr> <Tr> <Th_colspan="2"> Casualties and losses </Th> </Tr> <Tr> <Td> 450--860 Spanish 20,000 Tlaxcallan </Td> <Td> 100,000 warriors 100,000--200,000 civilians </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Siege of Tenochtitlan </Th> </Tr>

How many casualties were there due to the aztec attack on the leaving conquistadors
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