What important events did Franklin Pierce do?

Answer 1

Perhaps the high point of his life was his service in the Mexican War where he started out as a private and ended as a brigadier general. The aftermath was also good for him . He came home a war hero. He found a new young law partner who complemented his talents and his law practice became very successful . His wife who hated living in Washington took delight in their handsome little boy.

As president he was not much of a success. He vigorously pushed the Kansas-Nebraska Act which turned out to be a total failure, leading to a border war known as bleeding Kansas which he failed to deal with in any effective way.

He instigated what became known as the Ostend Manifesto which demanded that Spain either sell Cuba to the US or lose it to a war with the US. After this document became public there was so much public outrage that he had to formally repudiate it.