US Congressman, Civil War Union Army Officer. Born in Lagrange, Ohio, after he graduated from Washington College in Washington, Pennsylvania he read law in Cincinnati and Steubenville, Ohio, and was admitted to the Ohio State Bar Association in 1838. He established a law practice in Portsmouth, Ohio, and rose in local politics. After a term as Portsmouth’s City Solicitor, he was elected to the Ohio State Assembly as a Whig in 1850. In 1852 he was elected to the Ohio State Senate, becoming a Democrat after the Whig Party disintegrated in the early 1850s. In 1854 he was elected as an Opposition Party candidate to represent Ohio’s 10th Congressional District in the United States House of Representatives, and served a single term from 1855 to 1857. His support for former President Millard Fillmore in the 1856 Presidential Election, coupled with divisions within his own party, led to his defeat for re-election to a second term. He resumed his law practice, and supported Democratic Party causes. However, when the Civil War began, he supported the suppression of the rebellion and the preservation of the Union, and such support as a War Democrat influenced his commissioning as Lieutenant Colonel of the 33rd Ohio Volunteer Infantry on August 27, 1861. Assigned first to the Army of the Ohio, then the Army of the Cumberland, he accompanied his regiment as it participated in operations in Kentucky, Tennessee and Alabama. When the 33rd Ohio Infantry’s commander, Colonel Joshua W. Sill, was promoted to Brigadier General in July 1862, Oscar F. Moore was promoted to Colonel and regimental commander to fill the vacancy. He led the unit at the October 9, 1862 Battle of Perryville, Kentucky, where it held a forward position near the center of the Union lines. Confederate forces charged into the Ohioans, and in the fight Colonel Moore was shot in the leg. He refused to be taken from the field, and was captured by the Rebels from the 16th Tennessee Infantry. He was brought to the attention of the Confederates commander, Colonel John Houston Savage, who had served with Colonel Moore in the United States House of Representatives as a Congressman from Tennessee. Colonel Savage ordered his personal physician to attend to Colonel Moore, and he was eventually paroled soon after. Eventually exchanged, he returned to command his regiment as it joined the Army of the Cumberland fighting in Tennessee and Georgia. He commanded the unit in the September 1863 Battle of Chickamauga, the November 1863 Battle of Missionary Ridge and in the 1864 Atlanta Campaign, but his health deteriorated, and he resigned his commission due to disability on July 20, 1864. He continued again his private law practice, and passed away in Waverly, Ohio in June 1885 at the age of sixty-eight. His name is inscribed on the 33rd Ohio Infantry Monument in the Chickamauga National Battlefield in Georgia.