What are some of the problems that needed to be overcome in order for nasa to be able to land men on the moon and return them safely?

It would be if we could see the map

Historians are researchers of the past or people who understand the history of people. with this field, they must possess qualities such as being unbiased, patient, efficient reader, has a knack for logic and critical thinking and reasoning, disciplined, open-minded, resourceful, with good analytical ability, good reasoning skills and problem solving!

Just try your best buddy