No man's land was originally the area of land between the trenches of the opposing sides in World War I and other wars of that period which involved trench warfare. It was so called because the land belonged to neither side; it was in a kind of limbo between the opposing armies. No man's land was a very dangerous area because it usually provides none of the cover that trenches are designed to. However, soldiers were forced to venture into it when advancing, and stretcher bearers[?] would need to traverse it if they were to bring in the wounded.
... Sebastian del Cano[?] - completed the first circumnavigation, started by Magellan
Diego Cao, (died c. 1486), explored the African west coast
Jacques Cartier, ...