The Great Migration was a mass relocation of African Americans from the rural South to Northern cities between 1910 and 1970, driven by factors such as Jim Crow laws, racial violence, and economic opportunities in the North. Two major waves saw approximately 6.6 million people migrate, significantly increasing the black populations of cities like New York, Chicago, and Detroit. The migration led to urbanization and many challenges, including housing shortages and racial tensions, as migrants faced discrimination in their new environments.