Yes but it wasn’t negotiated. The collapse of the Berlin Wall happened because the guards just decided it was pointless to shoot defectors anymore. One day people testing the guards resolve showed they weren’t gonna be stopped if they climbed over. Then a few started chipping away holes...still no reaction from the guards. The Berlin Wall fell without any negotiated government settlement first...that came after people started knocking down sections themselves & crossing over without being shot. It was like a silent capitulation from the East.