The Diplomatic Service, also known as the Imperial Diplomatic Corps, functioned as a component of the Galactic Empire's military structure. It utilized diplomats across the galaxy to facilitate discussions and agreements between governing bodies and major businesses. Furthermore, the Diplomatic Service had the duty of disseminating Imperial regulations to planetary governors, which were then modified to suit the specific conditions of each location before being enacted.
In 18 BBY, Ambassador Telvar received orders to travel to Mon Cala to engage in negotiations with the planetary monarchy regarding disagreements concerning trade. After Telvar was killed when his Lambda-class T-4a shuttle was destroyed, it sparked both the Battle of Dac City and the invasion of Mon Cala. Blaise Zirkonn at one time thought about becoming a member of the Imperial diplomatic corps, but instead was transferred to Imperial Intelligence and later to the Order of Inquisitors.