Heir House Calderon
The youngest of all the Calderons in his generation Jeffrey was not initialy the heir apparent, but tragedy struck his family with alarming regularity until, finally, he was the only available Calderon of his generation to take the Protectorship. The eldest brother Edward died in a Dropship accident in 3034 and his brother Ian was eaten by a Thraxan Devourer in 3042 while on campaign with the mercenary Green Mountain Boys. His sister Janice would have been a marvelous Protector, but her infection with the Brisbane Virus, a degenerative nerve disease with no known cure, made her unable to take the Protectorship and keep what little of her health remained.. His last sibling Felix disappeared on an exploratory mission into the Deep Periphery and has not been seen since.. This decimation of House Calderon left Jeffrey the only heir when his fathers growing mental illness finally came to a head.
Jeffrey Calderon came to be Protector by usurping the power of his father Thomas in 3055. Thomas' paranoia had been growing for many years and reached a zenith in 3055 when he demanded that the military arrest prominent members of the government. These governmental officials had disobeyed his commands in regards to support of the Far Lookers movement and in the resumption of active colonization from the Concordat. Though his concerns, that extending the borders would make it harder to protect the peoples of the Concordat, were relevant, his response was not appropriate and Marshal Hadji Doru came to Jeffrey and begged him to take the reigns of government from his father.  With his assumption of power Jeffrey became one of the youngest Protectors in Taurian Concordat history.
The new Protector had many challenges facing him in his first years, including a faltering economy and a populace that was tired of the constant stresses due to the multiple years of heightened military alert under his fathers leadership. One of his first official acts was to repeal civilian conscription of builders and construction personnel as well as the various taxes that had been earmarked for military buildup in the Concordat. He also announced measures to enhance trade, both internal to the Concordat and with external governments and trading partners, as well as repealing the restrictions that had been on Concordat support of colonization.
In the years before becoming the Protector, Jeffrey had been in secret negotiations with the Emma Centrella of the Magistracy of Canopus to support stronger trade relations and joint colonization efforts. With his assumption of power these negotiations became open and, in March of 3056, the Treaty of Taurus was signed between the Canopian and the Concordat governments.
Jeffrey came to power with the support of the people and the military. He was ably advised by his sister Janice and was seen to be both intelligent and energetic, and under his guidance the Concordat entered a renaissance of sorts. Under his leadership the Taurian economy strengthened and his policies toward government spending caused a resurgence in production of all products throughout the Concordat. He authorized increased production of BattleMechs in Taurian factories, funding this expansion with the reorganization and streamlining of Military spending. The unofficial motto of his reign was "Men and Machines, anything else is wasteful".
During the waining years of the 3050's the Centrella lead Canopian government entered into an agreement with the Capellan Confederation that promised favored trade status and joint military support between the two realms. In 3058 diplomats from both nations approached the Protector to join the Cappellan/Canopian alliance as an equal partner. Though Jeffrey was hesitant regarding the military ties inherent in the Alliance he did see the advantages of a trade partnership for the Concordat. His hesitation led from his distrust of Capellan leader Sun-Tzu as well as his reluctance to commit Taurian forces to military adventures in the turbulent Inner Sphere. The three leaders agreed to meet in a summit to be held in the New Colony Region on the planet Detroit in the latter months of 3060. This planet was chosen because the state of the art BattleMech facilities that had been built with Capellan support were seen as a graphic example of the benefits of this potential Trinity Alliance. This decisions would have fateful consequences for both Jeffrey and the future of the Concordat.
On Christmas Eve of 3060 President Sherman Maltin and a group of rogue Colonial Marshals took the Magestrix and Protector hostage, demanding freedom for the New Colony Region in return for their safety and release. The leaders of the Canopian and Taurian government were held hostage until the early months of 3061 when a force comprised of Capellan and Magestrix units, led by Naomi Centrella, attacked the rebellious Colonial forces on Detroit. The rescue attempt freed the Magestrix, but Jeffrey Calderon was killed during the rescue when he was caught in the crossfire.
Upon his death, with no obvious or legally recognized heirs of House Calderon available, the mantle of Protector was take by Grover Shraplen, a vocal opponent to the policies and government of Jeffrey Calderon.
 Rumors of Heirs
Though Jeffrey was never married there do exist persistent rumors of an heir. The most prevalent lead back to his early years during his period of mandatory service in the Taurian Military. During this period it was known that he had a liason with an officer of the Taurian mercenary unit Prey's Divisionals. This romance was renewed upon his assumption of the Protectorship, and there is a youth of appropriate age among the dependents of this unit. If any know the truth of this potential Calderon heir it would be the members of the Divisionals and their Taurian commander Marshal Cham Kithrong of the TDF VI Corps.
These rumors would subsequently be proved true in the form of Erik Martens-Calderon, and with tensions between the Magistracy of Canopus and Taurian Concordat increasing between 3063 and 3066 over the actions of the TDF within the New Colony Region at Shraplen's instruction and the subsequent Canopian occupation of Detroit, Baron Kithrong called for Shraplen to step down in favor of Erik in 3066. Shraplen's subsequent refusal and the increasing instability of his government would ultimately lead to a number of Taurian worlds seceding and forming a new realm, the Calderon Protectorate, with Erik as ruler-in-waiting and Kithrong as regent.
 Titles & Positions
|Protector of the Taurian Concordat
| Succeeded by|
- ↑ The Periphery, 2nd Edition (sourcebook) p. 12
- ↑ 'Mercenaries Supplemental II p. 39
- ↑ The Periphery, 2nd Edition (sourcebook) pp. 13 and 14
- ↑ The Periphery, 2nd Edition (sourcebook) p. 13
- ↑ 5.0 5.1 5.2 5.3 The Periphery, 2nd Edition (sourcebook) p. 14
- ↑ 6.0 6.1 6.2 The Periphery, 2nd Edition (sourcebook) p. 26
- ↑ Field Manual: Periphery p. 49
- ↑ 8.0 8.1 8.2 Inner Sphere (sourcebook) pp. 105 and 106
- ↑ Mercenaries Supplemental II p. 55
- ↑ Handbook: Major Periphery States, p. 67, "Restoration: The Calderon Protectorate"