HENRY WAGER HALLECK
There are many theories as to why McClellan was so reluctant to attack even when he had more guns, more men, and better field position, but he almost always came up with a reason. Some historians believe that he really sympathized with the South and wanted the Union to end the war by allowing slavery to continue in the South. McClellan disliked Lincoln and even ran against him for President in 1864. Halleck was McClellan’s superior as General in Chief, but he could not get McClellan to attack any more than the President or others could. When Lincoln fired McClellan, things turned around with the Army of the Potomac.
There was little thought of emancipating slaves or their value to the South by the senior officers of the Union Army at the beginning of the war. The Secretary of War however changed that. See {629184}.
Henry Wager Halleck was a United States Army officer, scholar, and lawyer. A noted expert in military studies, he was known by a nickname that became derogatory: "Old Brains". He was an important participant in the admission of California as a state and became a successful lawyer and land developer. Halleck served as General-in-Chief of all Union armies from 1862 to 1864 during the American Civil War.