His amazing exploits were world-famous during the Second World War. He was good friends with the superhero Bulletman after the latter saved him from being brainwashed by the Mask. Immediately following the war, Spy Smasher briefly changed his name to Crime Smasher until he finally retired.
- Spy Smasher first appeared in Earth-S continuity in Fawcett Publications' Whiz Comics #2 by Bill Parker and C.C. Beck. He was reintroduced in Post-Crisis New Earth continuity in The Power of Shazam! #8 by Jerry Ordway, Curt Swan and Peter Krause.
- C.C. Beck stated that he based the look of Armstrong on Errol Flynn.
- Alan Armstrong is also known as the Defender of Democracy.
- 7 Appearances of Alan Armstrong (New Earth)
- 5 Images featuring Alan Armstrong (New Earth)
- 2 Quotations by or about Alan Armstrong (New Earth)
- Character Gallery: Alan Armstrong (New Earth)