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Henry Halleck - Wikipedia
Henry W. Halleck | Civil War, Union Army, Commander
Henry W. Halleck | American Battlefield Trust
Henry Halleck, Biography, Significance, General, Civil War
Henry Halleck Facts, Accomplishments - American History Central
Major General Henry Halleck in the Civil War - ThoughtCo
Henry Wager Halleck | Encyclopedia.com
Henry W. Halleck - U.S. National Park Service
Henry Halleck - U.S. Army Center of Military History
Commander of All Lincoln’s Armies: A Life of General Henry W. Halleck …