When someone is described as a "martyr", all this means is that this person died for a cause they they believed in, and that their death inspired others to follow in the cause in question, often in the face of opposition.
Answer:
The establishment and control of the Soviet satellite states
Between 1945 and 1949 Stalin created a Russian empire in Eastern Europe. This empire included Poland, Hungary, Romania, Bulgaria, Czechoslovakia and East Germany. Each had a Communist government.
Answer: Appomattox Courthouse on April 9, 1865.
Explanation: my social studies textbook.