Franklin Aretas Haskell (July 13, 1828 – June 3, 1864) was an American lawyer and Union Army officer during the American Civil War. He spent much of the war as a top aide to General John Gibbon, as Gibbon ascended the ranks from brigade to division to corps command. On the third day of the Battle of Gettysburg, their corps bore the brunt of the pivotal Confederate assault; Haskell personally rallied the troops of Gibbon's division after Gibbon was wounded. Gibbon later commented that "I have always thought that to him, more than to any one man, are we indebted for the repulse of Lee's assault."
In 1864, Haskell was promoted to colonel and given his own command, but he died just a few months later at the Battle of Cold Harbor. Before his death, Haskell wrote a famous account of the Battle of Gettysburg that was published posthumously.
