Soldiers in the 82nd Airborne and 101st Airborne divisions fought together on D-Day 80 years ago, but they carry on a fierce rivalry over hallowed spots the two liberated across Normandy.

Historian Donovan (Shoot for the Moon) provides a straight-shooting account of how parachutists and gliders from the 82nd Airborne slipped behind Axis lines in Normandy just before the start of ...