answers: Confederate forces
context: First Battle of Bull Run The First Battle of Bull Run (the name used by Union forces), also known as the First Battle of Manassas (the name used by Confederate forces), was fought on July 21, 1861 in Prince William County, Virginia, just north of the city of Manassas and about 25 miles west-southwest of Washington, D.C. It was the first major battle of the American Civil War. The Union's forces were slow in positioning themselves, allowing Confederate reinforcements time to arrive by rail. Each side had about 18,000 poorly trained and poorly led troops in their first battle. It </s> to suspect that the weak attacks from the Union brigade of Brig. Gen. Robert C. Schenck were merely feints. He was informed of the main Union flanking movement through Sudley Springs by Captain Edward Porter Alexander, Beauregard's signal officer, observing from southwest on Signal Hill. In the first use of wig-wag semaphore signaling in combat, Alexander sent the message "Look out for your left, your position is turned." Evans hastily led 900 of his men from their position fronting the Stone Bridge to a new location on the slopes of Matthews Hill, a low rise to the northwest of his </s> at an unguarded ford and struck the right flank of the Confederate defenders. This surprise attack, coupled with pressure from Burnside and Maj. George Sykes, collapsed the Confederate line shortly after 11:30 a.m., sending them in a disorderly retreat to Henry House Hill. As they retreated from their Matthews Hill position, the remainder of Evans's, Bee's, and Bartow's commands received some cover from Capt. John D. Imboden and his battery of four 6-pounder guns, who held off the Union advance while the Confederates attempted to regroup on Henry House Hill. They were met by generals Johnston and Beauregard, who had
question: who won the first battle of the civil war at bull run