Dillon, a celebrated Imperial figure from the Galactic Civil War, had become a figure of history by the time the First Order rose to power. First Order military captains honored Dillon with an armband on their uniform. During the mission to deactivate the hyperspace tracker aboard the Supremacy, Resistance operative Finn, accompanied by Rose Tico and DJ, donned a pilfered uniform bearing Dillon's name. This act caused stormtrooper 926 to believe Finn, whom he knew, had been elevated to the officer corps, based on the stolen uniform. During their brief encounter, 926 remarked that he was surprised to see Finn as a captain.
The name "Dillon" likely originates from costume concept artist Glyn Dillon.