The Battle of Bull Run, also known as First Manassas, was a significant military engagement that took place on July 21, 1861, during the early stages of the American Civil War. This battle occurred near Lewis' Farm in Virginia, now part of the present-day Manassas National Battlefield Park. The battle is named after Bull Run, a nearby stream.The Union Army, led by Major General Irvin McDowell, was initially successful in driving back the Confederate forces under General P.G.T. Beauregard. However, the tide turned when Confederate reinforcements arrived, leading to a crushing victory for the Confederacy and a shocking defeat for the Union.The Battle of Bull Run marked the first major land battle of the Civil War, demonstrating that the conflict would be longer and more devastating than many had anticipated. The event also highlighted the inexperience and disorganization within the Union Army, which was exploited by the Confederate forces. Today, the site serves as a historical landmark, reminding visitors of one of the most pivotal battles in U.S. history.