Clock? I think. I know they invented the calendar
The namib desert is the answer
Answer:
The Spanish campaign against the Aztec Empire had its final victory on 13 August 1521, when a coalition army of Spanish forces and native Tlaxcalan warriors led by Cortés and Xicotencatl the Younger captured the emperor Cuauhtemoc and Tenochtitlan, the capital of the Aztec Empire.
Explanation:
If Robert McNamara is one of the options, then he is the correct answer - he was important in the Vietnam War, but not during the WWII.