Lovell Harrison Rousseau (August 4, 1818 – January 7, 1869) was a general in the Union Army during the American Civil War, as well as a lawyer and politician in Kentucky and Indiana.

His father, David Rousseau, brought his family across the Appalachians from Virginia, but he had a difficult time regaining economic equilibrium (despite extensive holdings in undeveloped land and slaves).

)[3] Lovell successfully ran for the Indiana House of Representatives as a Whig candidate in 1844, and in 1846 he was commissioned as a captain in the Mexican–American War and charged with raising a company of volunteers.

When he returned from the war, he gained a seat in the Indiana Senate and continued to run a successful law practice.

As the Civil War was becoming more and more likely, Rousseau decided in favor of maintaining state government in Kentucky and helped keep it from seceding from the Union.

Against the opposition of many prominent figures in Kentucky, he succeeded in raising two regiments composed entirely of Kentuckians at Camp Joe Holt, across the Ohio River from Louisville in Jeffersonville, Indiana.

Rousseau opposed it having seen and heard about rebellious and illegal actions by agents working for the bureau, whereas Grinnell strongly supported the bill as a former active abolitionist and aide to runaway slaves.

The debates eventually turned into mudslinging, Grinnell questioning Rousseau's military record and insulting his performance in battle as well as a few comments on the state of Kentucky.

However, a committee was organized to investigate the incident which was composed of Nathaniel P. Banks, Henry J. Raymond, Rufus P. Spalding, M. Russell Thayer and John Hogan.

This article incorporates public domain material from the Biographical Directory of the United States Congress