Alan Armstrong was a wealthy aviator and athlete from Virginia. In early winter of 1940, he met a young woman named Eve Corby. Alan and Eve fell in love and were quickly engaged. Eve's father was an Admiral in the intelligence division of the United States Navy and often conferred with the playboy concerning matters of state. One evening, Admiral Corby told Alan about a suspected ring of saboteurs operating in the area.
Inspired by the notion of taking aim against enemy agents, Alan began putting together a new identity for himself. He designed a multifunctional vehicle known as a Gyrosub--which was capable of traversing nearly any level of terrain be it land, sea or air. He also fashioned a brown costume and aviator goggles for himself and took the name Spy Smasher.
Spy Smasher became a champion of justice and fought to keep foreign powers away from American interests. After his first initial adventures, Alan adopted a more stylish wardrobe consisting of a green two-piece uniform and a brilliant red cape. Although many of his adventures took place stateside, Spy Smasher was also extremely active in the European theater of operations during the Second World War. Near the close of the war, Spy Smasher teamed up with other patriotic heroes including Bulletman and Minute-Man to fight Nazi forces in Berlin, Germany.
After the war ended, Alan continued adventuring well into the Cold War era. During this time he briefly adopted the name Crime Smasher, but reverted back to his Spy Smasher identity before long.
- Hand-to-Hand Combat (Advanced)
- Gadgetry = Alan Armstrong designed and built the Gyrosub. 
- Aviation = Alan Armstrong flew, drove, dove, and sailed the Gyrosub. 
- Cryptography = Alan Armstrong kept a personal code book, with which he could crack many enemy codes.
- This version of Alan Armstrong (Earth-S), including all history and corresponding appearances, was initially erased from existence following the collapse of the original Multiverse in the 1985–86 Crisis on Infinite Earths limited series. However the ending of Convergence retroactively prevented that collapse, saving all the alternate realities, though in an "evolved" form. Even though versions of the character may have since appeared, this information does not apply to those versions.
- Spy Smasher was created by writer Bill Parker and artist C.C. Beck for Fawcett Publications. In 1953, National Periodical Publications settled a long-running lawsuit against Fawcett citing that the character of Captain Marvel bore too much of a resemblance to their own character, Superman. After settling the case (by agreeing to no longer publish Captain Marvel), Fawcett discontinued publication of their entire comic book line and Spy Smasher lapsed into obscurity. In 1972, DC Comics licensed many of the Fawcett characters, including Spy Smasher, and established that they existed on the fictional parallel world known as Earth-S. The Fawcett characters made several appearances throughout various Silver Age DC titles including, Shazam, World's Finest Comics and Justice League of America. In 1991, DC bought the Fawcett characters (including Spy Smasher) outright.
- Spy Smasher's original costume was two-tone brown. He later switched to a green costume with a red cape.
- C.C. Beck stated that he based the look of Armstrong on Errol Flynn.
- Spy Smasher is also known as the Defender of Democracy.
- 52 Appearances of Alan Armstrong (Earth-S)
- 4 Images featuring Alan Armstrong (Earth-S)
- 1 Quotations by or about Alan Armstrong (Earth-S)
- Character Gallery: Alan Armstrong (Earth-S)