The olive branch was a symbol of peace or victory. It was used mostly by the Federation when they sent envoys on missions of peace to various planets and governments.
History[edit | edit source]
In the 2261 of the Kelvin timeline, Capt. James T. Kirk decided to extend a olive branch towards the Klingons when sent a distress call from Khitomer when the Romulans attacked. (TOS - The Khitomer Conflict comic: "Part 1")
In 2293 of the Prime reality, Capt. Kirk and his crew of the USS Enterprise-A were chosen by the C-in-C to act as the olive branch to support Klingon Chancellor Gorkon's peace initiative.(TOS movie, novelization & comic adaptation: Star Trek VI: The Undiscovered Country)