United States
After the war, the assassination of Abraham Lincoln caused the Reconstruction, where policies were put together directed at getting back and rebuilding the Southern states while securing the rights of the newly freed slaves. The resolution of the disputed 1876 presidential election by the Compromise of 1877 ended this era, and the Jim Crow laws soon disenfranchised many African Americans. In the North, urbanization and a never-before-seen inflow of immigrants from Southern and Eastern Europe made the country's industrialization grow rapidly. The wave of immigration, lasting until 1929, gave labor and changed American culture. High tax protections, national infrastructure building, and new banking laws encouraged growth also. The 1867 Alaska Purchase from Russia completed the country's mainland expansion. The Wounded Knee Massacre in 1890 was the last major armed conflict of the Indian Wars. In 1893, the native monarchy of the Pacific Kingdom of Hawaii was ended in a secret and successful plan led by American residents. the United States took over the archipelago in 1898. Victory in the Spanish–American War the same year proved that the United States was a world power and led to the addition of Puerto Rico, Guam, and the Philippines. The Philippines gained independence fifty years later. Puerto Rico and Guam are still U.S. territories.