Answer: number one,number two and number three
Explanation:
The political and economic theories of Karl Marx and Friedrich Engels, later developed by their followers to form the basis for the theory and practice of communism.
Operation Barbarossa was the Nazi German military invasion of the "USSR", since this was the famous surprise attack by Germany that broke the Nazi-Soviet Pact in World War II.
Answer:
The strong Ottoman military and Navy made conquest much easier. Economically, the Ottoman Empire flourished because of its control on the land trade between Europe and Asia. When Sultan Selim I was in control of the Ottoman Empire, he conquered parts of Persia and Egypt.
Abolitionists employed each of these techniques. The underground railroad was a system used to help slaves escape. Religion played a critical role in helping people realize the immorality of slavery and armed force was used in certain cases (occasionally resulting in even greater problems or backlash from slave owners).
