EXCALIBUR ROUND U.S. Army soldiers test fire an Excalibur artillery round on Forward Operating Base Salerno, Afghanistan, Feb. 28, 2008. The Excalibur round is a precision guided global positioning system. The soldiers are assigned to the 82nd Airborne Division's 4th Brigade Combat Team, 321st Field Artillery. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 831514-Y-KSQ29-785.jpg Photo Gallery