What country with deep Celtic roots became a vast diaspora whose descendants far outnumber, in the United States, the population of their country of origin?

cultural/diplomatic relations. most medieval japanese   culture has chinese origins. writing, architecture etc.

accomplishment : zachary taylor’s was a national war hero in his battle in an mexican war

explanation:

he was known as a national war hero for his battles in the mexican war, taylor was elected as the 12th president of the united states in 1849. he led the nation during its debates on slavery and southern secession. after serving only 16 months in office, taylor died from cholera morbus on july 9,