Horace Calhoun was a sergeant from Connecticut who served in Tomahawk's Rangers as Tomahawk's second-in-command. Calhoun won his nickname "Cannonball" by hurling cannonballs at the enemy once during battle.
- This version of Horace Calhoun (Earth-Two), including all history and corresponding appearances, was erased from existence following the collapse of the original Multiverse in the 1985–86 Crisis on Infinite Earths limited series. Even though versions of the character may have since appeared, this information does not apply to those versions.
- 51 Appearances of Horace Calhoun (Earth-Two)
- 3 Images featuring Horace Calhoun (Earth-Two)
- Quotations by or about Horace Calhoun (Earth-Two)
- Character Gallery: Horace Calhoun (Earth-Two)
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