2271 (Columbia)

Reference Stardates 2/1400-2/1512.31

February

Reference Stardate 2/1403: Starfleet Intelligence later learns that a Klingon task force engaged a Romulan task force at this time in the Triangle. This skirmish, involving a total of eleven starships, demonstrates many flaws in the newly designed Klingon L-13 class battleship. (FASA-2224: Star Trek IV: The Voyage Home Sourcebook)
Reference Stardate 2/1404: Commander Montgomery Scott is reassigned to help refit the U.S.S. Enterprise. (FASA-2224: Star Trek IV: The Voyage Home Sourcebook)

Reference Stardate 2/1407: Starfleet Intelligence begins picking up rumors concerning unidentified starships and Klingons on Daros IV, and Orion-dominated neutral world. (FASA-2224: Star Trek IV: The Voyage Home Sourcebook)
Reference Stardate 2/1408.12 (21 April): Initial plans regarding Operation Dixie, a deep-probe intelligence and reconnaissance mission into Klingon space, are filed with Admiral Nogura, Chief of Starfleet Operations. Nogura approves the tentative proposal and sets the start date at 2/1901 (January 2277). (FASA-2224: Star Trek IV: The Voyage Home Sourcebook)

Reference Stardate 2/1410: The Miranda class light cruiser U.S.S. Reliant NCC-1864 is brought into a shipyard at Morena. The vessel is extensively modified, and sets the template for the next evolution of the Miranda class refits. (FASA-2224: Star Trek IV: The Voyage Home Sourcebook)
Stardate 8310.15/Reference Stardate 2/1410.21 (26 May): Starfleet Intelligence discovers that Commander Michael Thorn, assigned to investigate on Daros IV, is missing.(FASA-2224: Star Trek IV: The Voyage Home Sourcebook)