Answer:
Italy had the sharpest decline in immigration
Germany was the only county which increased from 1921 to 1929
After nearly four centuries of internal divisions and strife, China was reunited under the leadership of Yang Jian. A member of a respected aristocratic family, Yang Jian founded the Sui Dynasty. Yang Jian used Buddhism to help unite the kingdom.
Who Was responsible for raising his own guerilla army and attacking the British supply trains ?
Greece is a crossroad of cultures, it is in Europe, but also it is near Egypt and the East. So it had a big exchange of ideas and philosophy, it developped science and trade, and being surrounded by the sea, it developped maritime skills (military and trading fleet). This lasted form antiquity to modern history.