The Arrival of Railroads
A Railroad is like a Transport of things like a train. you can transport people from place to place with railroads or you can transport supplies
Hope this helps
Serfs, also known as peasants, were the lowest class of citizen in feudal societies. They were allowed to live on land own by Lords in return for labor, which was practically slavery.
C have a good day freind me
The invasion of Manchuria happened in 1932 which is 7 years before the official year of the start of World War 2 and 9 years before the US intervention in World War 2 (Pearl Harbor).