Hugh Boyle Ewing
During the Vicksburg campaign , Ewing accidentally came across personal correspondence from Confederate President Jefferson F . Davis to former President Franklin Pierce which eventually ruined the reputation of the latter . 
<triplet> Confederate President <subj> Jefferson F. Davis <obj> officeholder <triplet> Jefferson F. Davis <subj> Confederate President <obj> position held <triplet> Franklin Pierce <subj> President <obj> position held