Teacher:In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.
Teacher: Now, understand the problem? Solve this instance: Passage: The squadron was formed in December 1904 when Cruiser Squadron was re-designated the 1st Cruiser Squadron. In March 1909, then consisting of battlecruisers, it was assigned to the 1st Division of the Home Fleet until April 1912. When the First World War began, the squadron was assigned to the Mediterranean Fleet where it participated in the pursuit of the German battlecruiser and the light cruiser . It joined then Grand Fleet in January 1915 where it participated in the battles of Dogger Bank and the Battle of Jutland. It was disbanded after the battle as three of its four ships had been sunk in June 1916. In July 1917 H.M. Ships , and were detached from the 3rd Light Cruiser Squadron and named the First Cruiser Squadron, part of the newly formed Light Cruiser Force. It remained part of Light Cruiser Force until April 1919 when it was once again disbanded.
 Link Information: The Cruiser Squadron was a naval formation of the British Home Fleet consisting of Armored cruisers of the Royal Navy from 1899 to 1905. Answer: 5
Student:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
How long had the squadron been in existence when it was re-designated the 1st Cruiser Squadron?