Question: Which war did the operator of the Fabian Wrede-class training ship serve in?

Knowledge 1: Fabian Wrede-class training ship
Fabian Wrede class consists of three training ships used by Finnish Navy. The ships are used by the Naval academy of Finland for basic seamanship training, with particular emphasis on navigation in coastal and archipelago waters. The vessels in the class are "Fabian Wrede", "Wilhelm Carpelan" and "Axel von Fersen". All ships were built by Uudenkaupungin työvene Oy and commissioned between 2006 and 2008. The ships will replace the old Heikki class training ships. [SEP] Knowledge 2: Finnish Navy
When the Winter War broke out the Finnish Navy moved to occupy the de-militarized Åland Islands and to protect merchant shipping. In the first month of the war, battles between Soviet ships and Finnish coastal batteries were fought at Hanko, Finland, Utö and Koivisto. At Koivisto and Hanko, the batteries forced Soviet battleships to retire with damage. Finnish efforts to use submarines ("Vesikko" and "Saukko") to sink Soviet capital ships failed. In December 1939 the ice became so thick that only the ice-breakers could still move. The two coastal defence ships were moved to the harbour in Turku where they were used to strengthen the air-defences of the city. They remained there for the rest of the war.
Knowledge 1: Snake-class junk
The Snake-class junks were a class of six small vessels operated by the Royal Australian Navy (RAN) to support special forces operations in 1944 and 1945. The ships were lightly armed and were used to infiltrate special forces parties and their supplies into Japanese-held territory. [SEP] Knowledge 2: HMAS Doomba
HMAS "Doomba was a Royal Australian Navy (RAN) warship of World War II. Built for the Royal Navy around the end of World War I as the Hunt-class minesweeper HMS "Wexford, the ship only saw two years of service before she was decommissioned in 1921 and sold to the Doomba Shipping Company. The vessel was renamed SS "Doomba", converted into a passenger ship, and operated in the waters around Brisbane until 1939, when she was requisitioned by the RAN for wartime service. Serving first as an auxiliary minehunter, then an auxiliary anti-submarine vessel, HMAS "Doomba" was purchased outright by the RAN in 1940, and served until early 1946, when she was sold and converted into a linseed oil lighter. "Doomba" was scuttled off Dee Why, New South Wales in 1976.
Knowledge 1: Snake-class junk
The Snake-class junks were a class of six small vessels operated by the Royal Australian Navy (RAN) to support special forces operations in 1944 and 1945. The ships were lightly armed and were used to infiltrate special forces parties and their supplies into Japanese-held territory. [SEP] Knowledge 2: HMAS Samuel Benbow
HMAS "Samuel Benbow" was an auxiliary minesweeper operated by the Royal Australian Navy (RAN) during World War II. She was launched in 1918 by Hall, Russell & Company, Aberdeen. She was a Strath class trawler admiralty design. The ship operated in Australian waters from 1929, and was requisitioned by the RAN and commissioned on 5 September 1940. She was returned to her owners after the war.

Answer: Winter War