(Our Army at War I #153) - A English scout shot down Hammer's ally in a Rumpler observation plane, and he knew that he couldn't match the scout in the heights he could reach, so he drew him in by going into a dive as his engine seized. The scout pursued, and Hammer came out of his tailspin to down it. On the ground Hammer's mechanic said he came near death, but his comrades said a man without a heart could not die. He went into the woods to see his wolf friend, and heard chatter that he went to the woods because his urge for killing was never sated. A reporter from Berlin Tageblatt wanted pictures of the famous Hammer of Hell before he left to lead his Jagdstaffel on their next patrol, but Hans told him it was bad luck. His fellow aviator Erich Schloss was more than happy to have his picture taken, and made no secret that he wanted to catch up to Han's kill count. The Jagdstaffel encountered Bristol F.2As, and Erich asked to take Han's place as the advance attack to draw observer fire. He fared well initially, but was shot down. His sacrifice allowed the Jagdstaffel to win the skirmish, but Hans damned himself for letting Erich have his picture taken. His brother Werner wanted vengeance, and let the photographer take his picture. Hans refused to let Werner take the advance attack on their next flight, but he was still downed by anti-aircraft artillery. Hans felt responsible for everyone under his command, and again seethed at letting their pictures be the last ones before their deaths. He finally allowed the journalist to take his picture just before a French force attacked the airfield. Hammer made it into the sky, but the photographer died during the battle. Hammer said that the sky had no friends, and all were equally likely to die.

(Swamp Thing II #46) - Enemy Ace was transported to the present day due to the reality-altering effects of the Crisis. He was among the number of heroes teleported to the Monitor s satellite by Alexander Luthor, Jr., who explained his plan to make sure reality survived the Crisis.

(Enemy Ace: War Idyll #1) - <November, 1969> Von Hammer convalesced in a nursing home when he was approached by journalist Edward Mannock, who was doing a story on soldiers awarded medals of honor. Hammer recognized him as a fellow vet, and Mannock admitted he'd just come off a tour in Vietnam. Hammer said he was following the news, and the latest was a massacre at Mai Lai. Hammer said that in his war years he was led by conscience, submitting to murder because he served a purpose for his nation. His first responsibility was to his men, but he rejected vengeance and the accolades he received. His superiors learned to let him alone after a flight, and his only peer was a wolf he hunted with in the forest. He admitted that the wolf might have been a figment of his imagination, but he envied him because he killed only because he was hungry. Hammer was haunted by those he'd killed, and thought that during wartime the living envied the dead. Hammer grew tired, and agreed to continue the interview the next night. Mannock had been researching WWI, and was disturbed by the imagery and how little was different between Hammer's war and his own. Hammer told him about a dogfight from December 24, 1917 where he lost most of his men and was forced to eject. He landed in barbed wire, and gained clarity looking at the victorious enemy above. Visiting hours ended, and von Hammer said they should get outside the next time they talked. Mannock confessed that he wasn't a journalist, and he wasn't sure what he wanted to learn from von Hammer. Hammer said he knew, and sensed he needed to unburden himself. Mannock confessed that he panicked under fire, and used one of his fellow soldiers as a shield before being hit himself and sent home. Hammer said he was a cog in a machine, and some were marked for death. After von Hammer was shot down he found himself in the middle of a gas attack, and killed an enemy soldier for his gas mask. This finally personalized war for him, killing face to face without air machines and the sky being blamed as the killer. Night turned to day, and on Christmas the German, French and English soldiers called a ceasefire to celebrate the season. Von Hammer couldn't believe it, even though he participated. He told Mannock the war was still with him 50 years later, and every soldier needed to find something to keep them aloft to deal with their experiences. For von Hammer it was always flying. Hammer and Mannock met one more time, with Mannock pushing Hammer in his wheelchair onto the beach. Hammer said he;'d stopped writing after the war, and gave him his complete writings. He'd always had a vivid dream of dying during the war, taken by a valkyrie to join those he'd served besides, and those he'd killed. Von Hammer stared up at the seabirds, and feeling a moment of peace slipped away from life.

Enemy Ace received a profile in Who's Who: The Definitive Directory of the DC Universe #7.

Enemy Ace's appearances in Our Army at War I #151, 153 were reprinted in Enemy Ace Special #1.

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