Without Satellites, military communications and targeting will suffer drastically.
the vast majority of the 'smart' bombs that are in use rely on GPS, without GPS we are back to Korea war era targeting precision.
communications would in some ways be in worse shape (while the military keeps some of the old stuff around, just in case, the difference between what they are trained to expect to have available, and what they would have available would cause problems in itself)
space-based assets are a drastic force multiplier (both for offense and defense). I would say that they are well over a 10x multiplier, and I could see arguments putting them in the 100x range.
If being able to weaken your opponent by 10x or 100x doesn't make something a militarily significant target, I don't know what would.