The Muromachi period saw the following happen in Japan:

had the most important impact on the artistic work of the Japanese culture. But this time period saw the conversion of many officials into the religion of Christianity.

Explanation:

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".