On the Southern side we find equally striking characters. General Joseph E. Johnston was not held by Patterson in the Valley and with a portion of his army had reached Manassas on the afternoon of the 20th. In the Indian wars of Jackson's time Johnston had served his country; like McDowell and Beauregard, he had battled at the gates of Mexico; and like the latter he chose to cast his lot with the fortunes of the South. There, too, was Longstreet, who after the war was over, was to spend many years in the service of the country he was now seeking to divide. Most striking of all was "Stonewall" Jackson, whose brilliant military career was to astonish the world. The Union plan for this fateful July day was that Tyler should lead his division westward by way of the Warrenton turnpike to a stone bridge that crossed Bull Run, about four miles from Centreville. At the same time the main army under Hunter and Heintzelman was to make a detour of several miles northward through a dense forest to a ford of Bull Run, known as Sudley's Ford. Here they were to cross the stream, march down its right bank and, while Tyler guarded the Stone Bridge, engage the foe on the west side of Bull Run. The plan of the battle was admirably drawn, but the march around to Sudley's Ford was slower than had been expected, and it was ten o'clock before the main army reached the point west of the Stone Bridge. While the Federals were making their plans to attack the Confederate left wing, Generals Beauregard and Johnston were planning an aggressive movement against the left wing of the Federal army. They were to cross Bull Run by fords several miles below the Stone Bridge and attack the Northern troops on the weaker wing of the Union force in an effort to rout them before relief could be sent from the Federal right. The Confederate attack was planned to take place a few hours later than McDowell had decided to move. The Southern troops were preparing to cross the stream when the boom of cannon at the Stone Bridge told that the Federals had taken the aggressive and that the weak Confederate left was in danger of being overwhelmed by the superior numbers of the Union right wing. Orders countermanding the command to attack were quickly sent to the Southerners at the lower fords, and preparations were hurriedly made to repulse the attack of the Northern force.