What happened to Czar Nicholas II as a result of Russia participating in World War I?

Who was the fifth president of the u.s.

The chinese exclusion act was the first significant law restricting immigration into the united states. why do you think the us government singled out chinese immigrants in particular for exclusion?

At the end of civil war, which reconstruction plan called for a military occupation of the south ? a. lincoln's b. radical's c. johnson's