<P> Prince William County staged special events commemorating the 150th anniversary of the Civil War through 2011 . Manassas was named the No. 1 tourist destination in the United States for 2011 by the American Bus Association for its efforts in highlighting the historical impact of the Civil War . The cornerstone of the commemoration event featured a reenactment of the battle on July 23--24, 2011 . Throughout the year, there were tours of the Manassas battlefield and other battlefields in the county and a number of related events and activities . </P> <P> The City of Manassas commemorated the 150th anniversary of the battle July 21--24, 2011 . </P> <P> Part of the site of the battle is now Manassas National Battlefield Park, which is designated as a National Battlefield Park . More than 900,000 people visit the battlefield each year (in comparison, 22 million people visited nearby Washington, D.C. in 2016). As a historic area under the National Park Service, the park was administratively listed on the National Register of Historic Places on October 15, 1966 . </P>

What led to the first battle of bull run