I still think there is frontier today in the U.S. So, I would say false.
Not 100% though.
The answer would be Muslims
The Maritime Silk Road was the name given by a Japanese scholar in 1967 to distinguish it from the traditional Silk Road. This route surrounded many oceans and seas including; South China Sea, Strait of Malacca, Indian Ocean, Gulf of Bengal, Arabian Sea, Persian Gulf and the Red Sea.
