Army of the Potomac
Four days later, McDowell was replaced by Major general George B. McClellan. A month later the name was changed to the Army of the Potomac. McClellan began training McDowell's raw troops. He organized the army and made sure they were well equipped. For several months, Lincoln urged MaClellan to take the Army of the Potomac and go on the offensive. Finally Lincoln demanded he take action against the Confederate army.