Summary
Ukraine fired US-made ATACMS missiles into Russia’s Bryansk region, marking the first time Ukraine has used these longer-range weapons to strike targets deep inside Russia.
The attack comes after the Biden administration authorized Ukraine to use these weapons against targets inside Russia.
In response, President Putin updated Russia’s nuclear doctrine, labeling aggression from non-nuclear states supported by nuclear powers as a joint attack on Russia.
Some notes, to help folks stay better informed:
Ukraine has been firing ATACMS into “Russia” (occupied and annexed Crimea) for a good year already, without World War 3 breaking out
Ukraine has its own missiles too (mostly cruise, not ballistic, but they had at least a few dozen Soviet-made “Tochka” SRBMs) and they’ve been firing those at high value targets in Russia from day one of getting invaded, it’s simply that their supplies of Tochka have almost entirely run out, and their home-grown missile industry is a big fat target for Russian attacks (despite which Ukraine produces missiles, but currently not ballistic missiles of a practically usable sort)
ATACMS is effective and practical, with a cluster warhead it has shown ability of taking out Russian air defense batteries (S-400 and such), which are difficult targets to attack
this time too, air defense failed to stop them and they caused secondary detonations at a large ammunition storage site
since Russia is still attempting to conquer Ukraine, now with added North Korean soldiers sent by their dictator, there continues to be plentiful ground for other countries to supply Ukraine with more advanced stuff to fire at the invaders, lest they invade more of Ukraine or start invading elsewhere
foreign ballistic missiles that Russia has fired into Ukraine include North Korean and Iranian missiles, so foreign-made BMs flying about is ordinary stuff in this war