Both gram-positive and gram-negative bacteria commonly have a surface layer called an S-layer. In gram-positive bacteria, the S-layer is attached to the peptidoglycan layer (in gram-negative bacteria, the S-layer is attached directly to the outer membrane).
The Battle of 1st Manassas (1st Bull Run). (Battle Map). The first major battle of the Civil War was fought in Virginia, near the Manassas, Virginia railway junction, after which the battle is called (or First Bull Run, named after the flowing stream on the battlefield, if of the Union persuasion).
Name: First Battle of Bull Run or the First Battle of Manassas. War: American Civil War. Date of the First Battle of Bull Run: 18th to 21st July 1861. Generals commanding at the First Battle of Bull Run: The Federal Army commanded by Brigadier General Irvin McDowell. The Confederate Army commanded by Brigadier General Joseph E. Johnston and Brigadier General P.G.T. Beauregard.