What did Gorbachev sign with president Reagan in 1987?

In 1987, Mikhail Gorbachev and President Ronald Reagan signed the Intermediate-Range Nuclear Forces (INF) Treaty. This landmark agreement eliminated an entire class of nuclear weapons, specifically ground-launched ballistic and cruise missiles with ranges between 500 and 5,500 kilometers. The treaty marked a significant step in reducing Cold War tensions and was a pivotal moment in arms control history.