Manassas began life as Manassas Junction, so named for the railroad junction between the Orange and Alexandria Railroad and the Manassas Gap Railroad. The O&A owned the railway from Alexandria through Manassas to points south, ending in Orange, Virginia, while the MGRR was an independent line constructed from Manassas Junction through the Manassas Gap westward. In addition Manassas was the site of the first large scale military use of railroad transportation.