franklin pierce. The fourteenth president of the United States, who was the youngest senator in the United States, became famous in the Mexican War. He advocated building political parties by building the army. He sent Brigadier General Matthew Perry to open the door to Japan, forcing Japan to abandon its closed door and gradually enter the ranks of capitalist powers. Finally, Japan attacked Pearl Harbor in 1941 for the control of the Pacific Ocean.

Franklin Pierce (1953-1957), the 14th President of the United States, is the ancestor of Barbara Bush, the mother of the current President of the United States.