The Soviet Union Threatened to Use Nuclear Weapons

We argued for decades that the only thing holding back a soviet invasion of europe was the fact that we threatened to use nuclear weapons. The rolls have reversed, and russia argues that because they are conventionally inferior,  the west and nado have conventional superiority in terms of technology. Russia now has this position and imposes a challenge for us. We no longer view it as acceptable. And if you use a nuk, all bets are off. It's elyom a nuks anuk is a nuke. If you use one, then all our options are available. That could include nuclear response, if necessary. Which gets back to global zero point, which