The appropriate response is "Signature of the INF Treaty".
Explanation:
The signing of that same INF Treaty seems to be an alliance as well as the Soviet Union agreed to sign throughout Washington DC, Since eight December 1987, across certain then U.S's president, as well as the Secretary-General including its Communist Party Union.
Everything was formally adopted mostly by the Congress on May 27, 1988, as well as entered into force on the first of that year.
