Aleksandr Kerensky created the Blue Star medal to recognize MechWarriors who displayed unswerving loyalty and devotion to duty in the face of overwhelming obstacles. Only thirty-seven of these medals, known as the Blue Star of Kerensky, were ever awarded. When Kerensky called for the Exodus, gathering to him the core of the SLDF in preparation for the massive emigration, all thirty-seven Blue Star recipients chose to remain behind and continue to serve the Inner Sphere. As the First Succession War tore the Star League apart, Blue Star recipient Colonel Jeremiah Brighton put out the call for all other Blue Star holders to join him in an effort to preserve their honor and traditions. The three regiments formed with these troops - the 1894th Light Horse, the Avatars of Painful Death, and the Twenty-first Rim Worlds 'Mech Regiment - comprised the Blue Star Irregulars. The regiments chose House Davion from among the Great Houses as the contender truest to Star League ideals and entered service with the Federated Suns. For more than three hundred and fifty years, these regiments remained together and devoted to House Davion.