Vladimir Putin has said that a western move to let Kyiv use longer-range weapons against targets inside Russia would mean Nato would be “at war” with Moscow.
Putin spoke as US and UK top diplomats discussed easing rules on firing western weapons into Russia, which Kyiv has been pressing for, more than two and a half years into Moscow’s offensive.
“This would in a significant way change the very nature of the conflict,” Putin told a state television reporter.
“It would mean that Nato countries, the US, European countries, are at war with Russia,” he added. “If that’s the case, then taking into account the change of nature of the conflict, we will take the appropriate decisions based on the threats that we will face.”
I’d also add that during the very first statement Putin made announcing the invasion, on February 24, 2022, he ended it with what I imagine was intended to be interpreted as a nuclear threat:
https://en.wikipedia.org/wiki/On_conducting_a_special_military_operation
I don’t have a unified timeline of everyone’s activity, but we authorized military aid the next day, so I don’t think that the statement had a very extensive deterrent effect.
https://www.defense.gov/Spotlights/Support-for-Ukraine/Timeline/