One way that the Soviet Union controlled Eastern European areas was with the use of , seen below.
Fear

Secret Police

Propaganda

Elections

It may be written down (as in the united states) or it may be unwritten (as in great britain). this is the 1787 meeting at which the  constitution of the united states  was debated and agreed upon. this was a 1787 meeting called by congress to amend the articles of the confederation.