Thomas Holliday Hicks was a politician in the divided border-state of Maryland during the American Civil War. As governor, opposing the Democrats, his views accurately reflected the conflicting local loyalties. He was pro-slavery but anti-secession. Under pressure to call the General Assembly into special session, he held it in the pro-Union town of Frederick, where he was able to keep the state from seceding to join the Confederacy.

The Know Nothings were a nativist political movement in the United States in the 1850s, officially known as the Native American Party before 1855, and afterwards simply the American Party. Members of the movement were required to say "I know nothing" whenever they were asked about its specifics by outsiders, providing the group with its colloquial name.