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        Founding of Jamestown, Virginia, marking the beginning of European colonization in North America. - 
  
  
        Fight for independence from British colonies and establishment of a new nation. - 
  
  
        Creation of a federal government and establishment of the nation's fundamental principles. - 
  
  
        Conquest of new territories, the Oregon Trail, and the California Gold Rush. - 
  
  
        Conflict between Northern and Southern states, resulting in the abolition of slavery and the reunification of the country. - 
  
  
        Rapid industrialization, growth of cities, and emergence of a new working class. - 
  
  
        Social reform movement aimed at addressing the problems of industrialization and urbanization. - 
  
  
        Late entry of the United States into the war and its role in the Allied victory. - 
  
  
        Prohibition law that banned the production, sale, and transportation of alcoholic beverages. - 
  
  
        Global economic crisis that led to the implementation of the New Deal by Franklin D. Roosevelt. - 
  
  
        Crucial role of the United States in defeating the Axis powers and emerging as a global superpower. - 
  
  
        Ideological and geopolitical confrontation between the United States and the Soviet Union. - 
  
  
        Struggle for racial equality and the elimination of segregation. - 
  
  
        Prolonged and divisive conflict that weakened public confidence in the US government. - 
  
  
        Traumatic event that marked a generation. - 
  
  
        Political scandal that led to the resignation of President Richard Nixon. - 
  
  
        End of the Cold War and the beginning of a new world order. - 
  
  
        Terrorist attacks that changed US domestic and foreign policy. - 
  
  
        Invasion of Iraq and subsequent occupation. - 
  
  
        Victory of Donald Trump and a significant shift in US politics.