Several millennia before the Galactic Civil War, the Kalduu realized that the warring factions of the Ropagu were eventually going to destroy their planet. The Kalduu intervened in the struggles, making contact and winning the trust of the various Ropagu nations. Since then, the Kalduu have bonded with the minds of the various Ropagu leaders, filling their minds with peaceful thoughts while forming a form of symbiotic relationship. After many centuries of this existence, the Kalduu stopped influencing the minds of the Ropagu, using telepathy only to avoid warfare. Current generations of Kalduu often regret that their ancestors used this form of mind control on the Ropagu, but they also realize the potential danger that was averted.