The spread of slavery and greed for land.
It convinced Cubists that new art styles were needed to depict the modern world.
Answer:
Reconstruction was the turbulent era following the Civil War. The effort to reintegrate Southern states from the Confederacy and 4 million newly-freed slaves into the United States proved to be difficult. Under the administration of President Andrew Johnson, new southern state legislatures passed restrictive “black codes” to control the labor and behavior of former slaves and other African Americans. Outrage in the North over these codes eroded support for the approach known as Presidential Reconstruction and led to the triumph of the more radical wing of the Republican Party. During Radical Reconstruction, which began with the passage of the Reconstruction Act of 1867, newly enfranchised blacks gained a voice in government for the first time in American history, winning election to southern state legislatures and even to the U.S. Congress. In less than a decade, however, reactionary forces–including the Ku Klux Klan–would reverse the changes wrought by Radical Reconstruction in a violent backlash that restored white supremacy in the South.
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The surrender of Lord Cornwallis at Yorktown marked the end of the Revolutionary War.
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