At 8:45 A.M. on July 21st 1861, during the Battle of First Manassas (Bull Run), Capt. E.P. Alexander, CSA, sent America’s first battlefield telecommunication from this hilltop: “Look out for your left, you are turned.” His short warning to Col. Evans about Brig. Gen. McDowell’s flank march helped change an impending defeat into a crucial victory and secured for the signal corps a permanent place in the ranks of modern armies. It also honors America’s Confederate signal veterans, the first to raise in battle “the bonnie white flag that bears the crimson square.”
