Given the task definition and input, reply with output. Generate a correct and concise answer for the question based on the words in the context.

Context : The Fiat L6/40 was a light tank used by the Italian army from 1940 through World War II. It was designed by Fiat-Ansaldo as an export product, and was adopted by the Italian Army when officials learned of the design and expressed interest.
Question : In what year did Fiat L6/40 enter service?
1940