The Compromise of 1877 was an informal, unwritten deal, that settled the intensely disputed 1876 U.S. presidential election. It resulted in the United States federal government pulling the last troops out of the South, and formally ended the Reconstruction Era.
Catherine de Médici was able to "manipulate" European politics in the sixteenth century by marrying her daughters to the kings of Spain and France, since she is altering the minds of those elected through marriage.