Why was it more difficult for the ussr to prevent nationalist movements in its satellite stayed than in its member states?

Was the us justified in using the atomic bomb on hiroshima and nagasaki? why or why not?

15 points to the "charlemagne" section, what were the two policies that charlemagne implemented when he took the throne? what was the result of the policies and how did it impact his warriors?

What is the difference between an independent and a dependent variable?