I want to know the answer to the following question:
In what year did Tuscon become a stage station?
All the background I'm provided with is that "In 1857 Tucson became a stage station on the San Antonio-San Diego Mail Line and in 1858 became 3rd division headquarters of the Butterfield Overland Mail until the line shut down in March 1861.". Is that enough to answer the question?
Answer: yes