Rock served in the U.S. Army during World War II in Saint-Lô, France. One day, he ran into Kendra Saunders, who was trying to flee from Vandal Savage. Rock believed that she was trying to escape the Nazis. He gave Kendra a pen and paper to write with, before allowing her to stuff her note in to his helmet, despite his confusion over the situation. Just then, Rock was stabbed through the heart with a knife by Savage, killing him. His helmet eventually entered the possession of Rip Hunter aboard the Waverider.
- Helmet: While fighting in World War II Rock wore this helmet to protect his head from gunshots and gaining injuries, after his death at the hands of Vandal Savage the helmet was acquired by Rip Hunter.
- M1928A1 Thompson: Rock wielded this submachine gun during World War II.
DC's Legends of Tomorrow
Behind the scenes
- Although not named during his appearance, Rock's helmet was identified via DC Comics' official Instagram.
- In the DC Comics, Sgt. Frank Rock was an American army officer and leader of the infamous Easy Company unit.