The two classes are the proletariat which is the working class who make up the majority of the population within society and must work to survive
One of the most important ways in which you can show your opposition to what you consider an unjust law is by organizing support of like-minded people and organizing a protest of some sort--whether this be holding up signs outside of Congress, or boycotting a particular good.
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Answer:
World War II was the first war that claimed the lives of more civilians than soldiers and witnessed the horror of the first systematic genocide in modern history with the Holocaust. In addition, many cities, towns and villages across Europe were completely destroyed by aerial bombing and heavy artillery. The American troops provided moral support. The presence of many soldiers encouraged them to fight though the troops had no experience and were also unprepared but they had an impact to the victory.