The Legion of Honor was a commendation given by Starfleet to honorable Starfleet members.
Philippa Georgiou received the Legion of Honor prior to 2256. (DIS: "The Butcher's Knife Cares Not for the Lamb's Cry")
Sometime during his service in Starfleet, Christopher Pike was awarded this medal. This medal, along with other awards, was listed in the commendations section of Pike's personnel file. (DIS: "Brother")
In late 2256, Admiral Terral informed Captain Gabriel Lorca that he would receive the Legion of Honor following his victory over the Klingons at the Battle of Pahvo. Lorca later told Paul Stamets that he had recommended to give it to him instead. (DIS: "Into the Forest I Go")
Leonard McCoy received the Legion of Honor prior to 2267. (TOS: "Court Martial")
Data received the Legion of Honor prior to 2365. (TNG: "The Measure Of A Man")
This commendation wasn't referenced in the final draft nor the revised final draft of the script for "Court Martial".