I'm not hearing this-- Your holiday, his holiday... Don't you understand what's being celebrated tonight? Hope, and peace, and love! You can't do battle in the name of love! This is a season for everyone... But your anger cheapens it! Every time a man raises his hand against his neighbor in the name of his faith, he renounces his faith! No good has ever come of a holy war, and never will! Now I want you all to forget your differences, and remember the principles you share! 
- — Superman
Action Comics #517 is an issue of the series Action Comics (Volume 1) with a cover date of March, 1981. It was published on December 23, 1980.
Synopsis for "The War for Peace!"
Superman recovers a religious artifact beloved by two races and stops them from going to war upon each other on Christmas Eve.
Appearing in "The War for Peace!"
Featured Characters:
Supporting Characters:
- Lois Lane
- Lana Lang (Cameo)
- Steve Lombard (Cameo)
- James Olsen (Cameo)
- Perry White (Cameo)
Antagonists:
Other Characters:
- Daily Planet Employees (Unnamed)
- Julius Schwartz?? (Unnamed) (resembles DC Editor Julius Schwartz) (Cameo)
- Six Kids (Unnamed) (fighting each other) (Single appearance)
- Margoi Alien Race:
- Nemrul (Single appearance)
- Clone Warriors (Single appearance)
- Warship Pilots (Unnamed) (Single appearance)
- Aloi Alien Race:
- Tumlat (Behind the scenes) (Single appearance)
- Kaffa (Single appearance)
- Old One (Unnamed) (priest) (Single appearance)
- An Aloi (Unnamed) (Single appearance)
- Gunners (Unnamed) (Single appearance)
Locations:
- 1980
Items:
- Mistletoe
- Grayl (Single appearance) (religious artifact made of Iridium)
- Two Harpoon Spears
- Laser Cannons (Destroyed)
Vehicles:
- Nemrul's Spacecraft (Destroyed) and (rebuilt by Superman)
- Tumlat's Spacecraft
- Four Margoi Warships (Destroyed)
Synopsis for "Brother Rat!"
Aquaman learns from Vulko that Mera will die unless she returns to her other-dimensional world before long. Nonetheless, she accompanies her husband to New York City, where they fight Ocean Master, who leaps off a building to his apparent death.
Appearing in "Brother Rat!"
Featured Characters:
Supporting Characters:
- Cal Durham
- Mera
- Vulko
- Atlanna (Mentioned only)
Antagonists:
- Two Muggers (Unnamed) (Cameo)
- Ocean Master
Other Characters:
- Black Manta Robot (In ruins)
- Black Manta (Mentioned only)
- Scavenger (Mentioned only)
- Poseidon Impostor (Mentioned only)
- Two Giant Seahorses (Unnamed)
- Citizens of New York City (Unnamed)
- Gus D. Tyrone (Mentioned only)
- Kingdom of Hope
- Secretary (Unnamed) (Single appearance)
Locations:
- Atlantic Ocean
- Atlantis
- Police Station
- Atlantis
- Xebel (Mentioned only)
- Florida
- New Venice (Mentioned only)
- New York
- New York Harbor
- New York City
- Building (Unnamed)
- Sixth Floor
- Kingdom of Hope
- Sixth Floor
- Building (Unnamed)
Items:
- Mera's Molecular Vibration Belt (developed by Vulko)
- Electro-net
Vehicles:
Notes
- The Aquaman story continues from Adventure Comics #478.
