 Beauregard and Joseph E. Johnston sent timely reinforcements that turned the tide of battle in the Confederates' favor.On the Union side, Albert Myer attempted to deploy a military observation balloon at Manassas, bringing along 20 troops from the 26th Pennsylvania Infantry because of the lack of Signal Corps personnel that early in the war.Because of the haste of these untrained men, the balloon was damaged after a collision with a tree and could not be used for the battle.