While travelling through the Gettysburg Battlefield, scattered among the memorials, cannons & monuments a visitor will notice an upright cannon barrel standing atop a pedestal base. On some Civil War battlefields these markers represent the site where a particular General was killed or wounded. Here at Gettysburg, however, where they are sometimes (lightheartedly) referred to as Union/Confederate Anti-Aircraft battery markers; they truly mark the location of a Union or Confederate corps commander’s headquarters. There is little to distinguish between the two sides except that the cannon barrel is generally longer for a Union headquarters location. Including the marker for army commander General George G. Meade there are a total of ten Union markers – while, including General Robert E. Lee, there are four for the South.