Place the four American space programs in the order in which they appeared.

Project Mercury was launched in the period ( 1959-1963). Project Gemini was just for a one year period (1965-1966). Project Apollo was launched in the period (1961-1975). Space Shuttle is a pretty latest project (1971-2011)

Explanation:

the space race was a battle to make advanced technology to get to the moon and to get a better understanding of space.

a widespread disease that killed many people

the split of the christian church

invasion from arab muslims