Quoc: The U.S. Mail traces its roots to 1775 during the Second Continental Congress, when Benjamin Franklin was appointed the first postmaster general. The Post Office Department was created in 1792 from Franklin's operation, elevated to a cabinet-level department in 1872, and transformed in 1971 into the U.S. Postal Service as an independent agency.

Answer this question based on the passage: when was the united states postal service created?
HW Chung: OK, some thoughts:
The relevant information is: The Post Office Department was created in 1792 from Franklin's operation, elevated to a cabinet-level department in 1872, and transformed in 1971 into the U.S. Postal Service as an independent agency. The answer is 1971.