D.: Congress established the Pendleton Service Act, after the assassination of President Garfield our 20th president. The commission was created to administer the civil service of the United States federal government.
The Mongols had conquered the Russian by 1240, but in twenty years they faced problems. Split into four parts The problem was the death of the founder of the Mongol Empire, Genghis Khan, these four parts were each ruled by a son of the great leader.