There are Headquarters Markers on the Gettysburg battlefield for each of the Army and Corps for both armies:

CSA: Army HQ, and three Corps HQ
USA: Army HQ, eight Infantry Corps HQ (there were two commanders of the First Corps), and Chief of Artillery HQ. There is no HQ marker for the Union Cavalry Corps.

Confederate Headquarters Markers

	General Robert E. Lee Army of Northern Virginia		Lieutenant General James Longstreet First Corps
	Lieutenant General Richard S. Ewell Second Corps		Lieutenant General Ambrose P. Hill Third Corps

Union Headquarters Markers

	Major General George Mead Army of the Potomac		Major General Abner Doubleday First Corps (July 1)
	Major General John Newton First Corps (July 2-3)		Major General Winfield S. Hancock Second Corps
	Major General Daniel E. Sickles Third Corps		Major General George Sykes Fifth Corps
	Major General John Sedgwick Sixth Corps		Major General Oliver O. Howard Eleventh Corps
	Major General Henry W. Slocum Twelfth Corps		Henry J. Hunt Chief of Artillery