|Born||19 March 2526|
|Died||27 October 2567|
|Parents||Caterina Calderon (mother)|
He is credited with preparing his nation to resist the Star League so well that it took the bulk of the League's troops nearly 20 years to force a surrender. Mitchell ascended to the Protectorship at the 14th March 2574.  The day after the Proclamation Mitchell accelerated the Concordat's military buildup by mobilizing his nation for war. He made special efforts to expand his nation's Naval forces so as to give the training programs in the Hyades Cluster time to complete preparations for defending the outer systems. Mitchell was the architect of both the triumphant Case Amber and the desperate Case Black Naval battles. He is also responsible for the assassination of General Amalthia Kincaid with a "miracle weapon". 
The sourcebooks do not give the name/names of any wife/wives nor of his sibling (a brother), but paragraphs describing Henry Calderon's selection as Protector lists Marantha as having an extended family of siblings, cousins and an uncle with at least one son.
- Historical: Reunification War, p. 62, "Mitchell Calderon Profile"
- Historical: Reunification War, p. 162, "Traitor or Patriot?"
- The Star League,p.47
- The Periphery (sourcebook), p. 28
- The Periphery, pp. 28, 29
- The Periphery (sourcebook), p. 32