Some prominent Union military and naval commanders and officers were opposed to slavery.  During the course of the Civil War, a number of these officers were involved in activities helping slaves and former slaves.  The following is a partial list.

Frémont, John C., Major General, US Army

Howard, Oliver Otis, Major General, US Army

Hunter, David Dard, Major General, US Army

Patterson, Daniel, US Naval Commander

Ross, George T., Colonel, US Army

Shaw, Robert Gould, Colonel, 54 Massachusetts Infantry, U.S. Colored Troops, US Army

Slocum, Henry Warner, Major General, US Army

Thomas, Lorenzo, Major General, US Army

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