Teacher:Generate a correct and concise answer for the question based on the words in the context.
Teacher: Now, understand the problem? Solve this instance: Context : On 2 April 1953, OTCM order #34765 standardized the last of the Patton series tanks as the 90mm Gun Tank M48 Patton.
Question : In what year did M48 Patton enter service?
Student:
1953