It depends on how specific you want to be, but he was declared kaiser in 1871; more specifically, January 18th, 1871.
Manchuria is the answer because the Japanese invaded on 1931
In the United States, the three main factors that make up the system of checks and balances would be the Executive Branch, the Legislative Branch, and the Judicial Branch, since the goal is to separate these powers so that no single power becomes too powerful.
