Charles Sumner —
Photo Credit: By Mathew Brady - Public Domain, https://commons.wikimedia.org/w/index.php?curid=1349933

Preston S. Brooks — Representative in Congress of the U.S. from South Carolina
Photo Credit: By Created by Adam B. Walter (1820-1875) - Public Domain, https://commons.wikimedia.org/w/index.php?curid=3210824

Douglass argued against John Brown's plan to attack the arsenal at Harpers Ferry —
Photo Credit: By Jacob Lawrence - Public Domain, https://commons.wikimedia.org/w/index.php?curid=17073397

John William Reid, Missouri Congressman —
Photo Credit: By S.J. Clarke Publishing (St. Louis, MO) - Public Domain, https://commons.wikimedia.org/w/index.php?curid=47964071

— In the Kansas State Capitol
Photo Credit: By John Steuart Curry - United Missouri Bank of Kansas City, Public Domain, https://commons.wikimedia.org/w/index.php?curid=48498757

The Battle of Black Jack Historical Marker —
Photo Credit: http://www.thecivilwarmuse.com/index.php?page=battle-of-black-jack

Battle of Yellow Tavern — CAVALRY FIGHT AT YELLOW TAVERN, NEAR RICHMOND. VA. MAY 11th 1864. BETWEEN THE FORCES OF PHIL. H. SHERIDAN AND J E B. STUART. Identifier: generalsbattleso00bomb2 (find matches) Title: Generals and battles of the Civil War Year: 1891
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=44241567

Henry Clay Pate —
Photo Credit: Public Domain - West Virginia State Archives

Pottawatomie Massacre —
Photo Credit: https://thehistoryjunkie.com/pottawatomie-massacre-facts-and-outcome/

Sacking of Lawrence — Ruins of Free State Hotel after Sacking of Lawrence. Image from State Historical Society of Missouri.
Photo Credit: State Historical Society of Missouri - Public Domain, https://commons.wikimedia.org/w/index.php?curid=7387474

Samuel Jefferson Jones —
Photo Credit: By Kansas Historical Society - Public Domain, https://commons.wikimedia.org/w/index.php?curid=85077036