After the Battle of Bull Run, July 21, 1861, won by the Confederate General Beauregard over General McDowell, against all expectation, to the dismay and indignation of the whole North,--the result of over-confidence on the part of the Union troops, and a wretchedly mismanaged affair,--the attention of the Federal government was mainly directed to the defence of Washington, which might have fallen into the hands of the enemy had the victors been confident and quick enough to pursue the advantage they had gained; for nothing could exceed the panic at the capital after the disastrous defeat of McDowell. The demoralization of the Union forces was awful. Happily, the condition of the Confederate troops was not much better. But the country rallied after the crisis had passed. Lincoln issued his proclamation for five hundred thousand additional men. Congress authorized as large a loan as was needed. The governors of the various States raised regiment after regiment, and sent them to Washington, as the way through Maryland, at first obstructed by local secessionists, was now clear, General Butler having intrenched himself at Baltimore. Most fortunately the governor of Maryland was a Union man, and with the aid of the Northern forces had repressed the rebellious tendency in Maryland, which State afterward remained permanently in the Union, and offered no further resistance to the passage of Federal troops. Arlington Heights in Virginia, opposite Washington, had already been fortified by General Scott; but additional defences were made, and the capital was out of danger. With the rapid concentration of troops at Washington, the government again assumed the offensive. General George B. McClellan, having distinguished himself in West Virginia, was called to Washington, at the recommendation of the best military authorities, and intrusted with the command of the Army of the Potomac; and soon after, on the retirement of General Scott, now aged and infirm, and unable to mount a horse, McClellan took his place as commander of all the forces of the United States. At the beginning of the rebellion McClellan was simply a captain, but was regarded as one of the most able and accomplished officers of the army. His promotion was rapid beyond precedent; but his head was turned by his elevation, and he became arrogant and opinionated, and before long even insulted the President, and assumed the airs of a national liberator on whose shoulders was laid the burden of the war. He consequently estranged Congress, offended Scott, became distrusted by the President, and provoked the jealousies of the other generals. But he was popular with the army and his subordinates, and if he offended his superiors his soldiers were devoted to him, and looked upon him as a second Napoleon.