Tocan system

The Tocan system was a star system. During the early rebellion, the Alliance to Restore the Republic used the UT-60D U-wing starfighter/support craft in the capacity of a gunship during an extraction. The UT-60D's role in the extraction was noted in a report from General Antoc Merrick to Commander-in-Chief Mon Mothma was was included in The Rebel Files.

Behind the scenes
The Tocan system was first mentioned in Star Wars: The Rebel Files, a canon 2017 boxed set and reference book by Daniel Wallace.