While most African Americans serving at the beginning of WWII were assigned to non-combat units and relegated to service duties, such as supply, maintenance, and transportation, their work behind front lines was equally vital to the war effort.
Mongolia gained control of the route in 1275 and kept it that way until it closed.
The correct answer is Rome, Italy. This is because although the name comes from the 19th century, the road system was used as far as 2 BC, meaning that Rome was a great empire then and there is even a saying that all roads lead to Rome. Of course it's different nowadays, but at that point in time it connected those two cities, Chang'an and Rome.
