The bulk of those units sent to the Gulf returned to the US or were disbanded, as were many units in Europe and the US throughout the 1990s.
In the end only a small fraction of the US forces permanently stationed in Europe in the last years of the Cold War remained by the 2010s. I would count noses between, say, 1991 and 2016, or 1989 and 2016 if you like.
The demand for troops mainly came from the Eastern Euros, such as the Poles. They have wanted and been calling for more US units permanently stationed for decades.
Don’t we currently have about 30,000 in Italy?