Detailed Instructions: Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.
Q: Context : The Davidka (Yiddish: , ''Little David'') was a homemade Israeli mortar used in Safed and Jerusalem during the early stages of the 1948 Israeli War of Independence.
Answer : 1948
A:
What was the year Davidka entered service?