Input (grade 12): In the Armistice Agreement of July 27, 1953, the DMZ was created as each side agreed to move their troops back 2000 m from the front line, creating a buffer zone 4 k wide.
Output (grade 5): In the ceasefire of July 27, 1953, the DMZ was created. Each side agreed in the armistice to move their troops back 2000 m from the front line, creating a buffer zone 4 k wide.