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.
Problem:Context : On 2 April 1953, OTCM order #34765 standardized the last of the Patton series tanks as the 90mm Gun Tank M48 Patton.
Answer : 1953
Solution:
In what year did M48 Patton enter service?