What major historical event that happend in 1847-1931?

The major historical event that happened between the years 1847-1931 was the American Civil War (1861-1865). The American Civil War was a conflict fought between the United States and the Confederate States of America, a group of eleven Southern states that had seceded from the Union. The war was fought over several issues, including states' rights, slavery, and economic development, and resulted in the victory of the Union and the abolition of slavery in the United States.