Complex sentence: However, the missiles and the wing did not stay long; the United States and the Soviet Union signed the Intermediate-Range Nuclear Forces Treaty in 1987 which led to the removal of all nuclear missiles from the base by October 1988.
Split into simpler sentences: However, the missiles and the wing did not stay long. The United States and the Soviet Union signed the Intermediate-Range Nuclear Forces Treaty in 1987 which led to the removal of all nuclear missiles from the base by October 1988.