Answer:
I think the answer is Silver mining, Nevada Hopefully this helps!
Charlemagne's crowning made the Byzantine Emperor redundant, and relations between the East and the West deteriorated until a formal split occurred in 1054. The Eastern Church became the Greek Orthodox Church by severing all ties with Rome and the Roman Catholic Church — from the pope to the Holy Roman Emperor on down
Thomas jefferson caused Louisiana Purchase?
Answer:
Immigration is the act of leaving one's countries and moving to another country of which they are not natives, nor citizens, to settle or reside there, especially as permanent residents or naturalized citizens, or to take-up employment as a migrant worker or temporarily as a foreign worker.
Soviet Union had its roots in Russia and it was 1922 - 1991 that's all I know sorry