Browsing named entities in John G. Nicolay, A Short Life of Abraham Lincoln, condensed from Nicolay and Hayes' Abraham Lincoln: A History. You can also browse the collection for September 4th or search for September 4th in all documents.

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river at the same time would either prevent this, or compensate for it by throwing Columbus into our hands. Similar questions also went to Buell, and their replies showed that no concert, arrangement, or plans existed, and that Halleck was not ready to cooperate. The correspondence started by the President's inquiry for the first time clearly brought out an estimate of the Confederate strength opposed to a southward movement in the West. Since the Confederate invasion of Kentucky on September 4, the rebels had so strongly fortified Columbus on the Mississippi River that it came to be called the Gibraltar of the West, and now had a garrison of twenty thousand to hold it; while General Buckner was supposed to have a force of forty thousand at Bowling Green on the railroad between Louisville and Nashville. For more than a month Buell and Halleck had been aware that a joint river and land expedition southward up the Tennessee or the Cumberland River, which would outflank both posit
e movement of the enemy, keeping the Army of the Potomac constantly in a position to protect both Washington and Baltimore against an attack. In this way it happened that without any order or express intention on the part of either the general or the President, McClellan's duty became imperceptibly changed from that of merely defending Washington city to that of an active campaign into Maryland to follow the Confederate army. This movement into Maryland was begun by both armies about September 4. On the thirteenth of that month McClellan had reached Frederick, while Lee was by that time across the Catoctin range at Boonsboroa, but his army was divided. He had sent a large part of it back across the Potomac to capture Harper's Ferry and Martinsburg. On that day there fell into McClellan's hands the copy of an order issued by General Lee three days before, which, as McClellan himself states in his report, fully disclosed Lee's plans. The situation was therefore, as follows: It