On Aug. 3, 1862, Gen. George B. McClellan received orders to begin withdrawing the Army of the Potomac from its position in front of Richmond, Va. The new Union general in chief, Henry Halleck, had given McClellan a choice: to renew his offensive against Richmond or ship his army back to Washington. McClellan resented and resisted Halleck's authority, and stubbornly refused to advance, thinking Halleck would eventually recognize the folly of a withdrawal.
This is ignoring a direct order from his superior officer, I believe.
This isn't exactly what happened.
On the evening of 25th July the steamer
Hero arrived with Halleck, Meigs and Burnside aboard. Burnside had arrived in Washington on 22nd July. They had sent no messages ahead. On being told Halleck had arrived, McClellan told all his Corps Commanders to board the
Hero and went there himself. On boarding Halleck told him that he didn't want to talk to the CC's. However, soon they started arriving. Heintzelman recorded he had about half an hour of small talk with Halleck
et al., and then they all went away, leaving Halleck on the
Hero.
At McClellan's HQ on land, the CC's and a few others were told by McClellan that Halleck had forbidden their planned movement across the James, and given them two options: attack Richmond on the left bank of the James with Burnside's reinforcements only, or retreat to Washington. The arguments went back and forth for several hours. With two exceptions it was agreed to wait for Burnside's troops and then attack on the left bank. The two exceptions were Keyes and Franklin. Keyes had been a long standing opponent of the James line, and this was expected. Franklin's opposition was perhaps unexpected. Franklin was not a McClellan loyalist, he was part of McDowell's clique. He was under extreme suspicion since his unordered retreat from the White Oak line which resulted in McClellan separating him from his command. McClellan spent much of the meeting in the tent next door trying to persuade Franklin, but to no avail.
The next morning McClellan, Sumner, Heintzelman and Burnside boarded the
Hero and told Halleck of their decision. In the afternoon the
Hero departed, carrying not just Halleck, but Burnside, Keyes and Franklin. The
Hero returned to Washington on the 27th. Halleck
wrote down his report or what had occurred, and on the 28th was in cabinet with Lincoln etc., Burnside and the bureau chiefs. The main topic of conversation was a
letter Keyes sent to Meigs on 23rd July.
As an aside, Meigs was feeding Keyes' negative letters directly to Lincoln and Stanton. As CB Grayson's article notes, Meigs had reached the conclusion that McClellan was a more deadly enemy than the rebel army, and his removal was necessary. Hence over the coming months Meigs worked tirelessly to hamstring McClellan. The disappearance of the supplies for McClellan's army in September-October '62 was likely a deliberate act by Meigs to prevent McClellan's success. Meigs was one of the three bureau officers on the War Board who effectively told Lincoln what to do. The other two were Wadsworth and
Buckingham (who was brought in to oust the McClellan friendly EA Hitchcock, cementing the complete anti-McClellan bias of the senior staff).
The morning of the 28th, before McClellan had had time to do anything, the cabinet made the decision to withdraw McClellan's Army. Meigs went in with a brief prepared, using Keyes' letter and a dodgy undercount of the enemy army he
created against McClellan's
returns to suggest McClellan outnumbered Lee 3:2 (158,000 to 105,000) and hence needed no reinforcements. His attempts to get Ingalls, the QM of McClellan's army to agree were
rebuffed and his deputy also
rebuffed Meigs' assessment, and so their evidence, like all contrary to Meigs' prosecutorial case, was suppressed.
However, the order would have to be issued by Halleck, and it took a lot of pressure to get Halleck to do this. McClellan had
agreed to and put in writing the plan to advance when Burnside's 20,000 men (13,000 already at Fort Monroe plus 7 regiments from NC and 4 from SC sent for) arrived, although he noted that if 15-20,000 could be added from the west, things would be more certain. Halleck said that this changed his mind. However, he did not issue an
order to McClellan to start running down his army until the 30th July. Why the delay?
Halleck's
letter to his wife of 28th July makes it clear that he's washed his hands of McClellan. We can determine from various letters and Burnside's movements that on 28th July Burnside was offered command of the Army of the Potomac, but refused. Halleck's plans to replace McClellan with Burnside were thus thawted.
On the 30th Halleck
issues the order to start running down McClellan's army by removing the sick. He issued the orders sending Burnside to Aquia Creek on 1st August, and orders for a general retreat from Virginia on the 3rd August.
McClellan meanwhile has actually mounted a renewed offensive. Forbidden from continuing his movement over the James, McClellan brought much of his force onto Malvern Hill for a Bermuda Hundred movement. Lee reacted by mounting a general concentration against McClellan in the vicinity of the old Glendale battlefield. Then the order from Halleck arrived. McClellan promptly obeyed, and broke off his offensive. He started packing up to withdraw as ordered, but Halleck ignored the fact that it had taken a month to move McClellan's force to the Peninsula, and it would likewise take a month to move it back.