He declared that a conventional attack by any nation supported by a nuclear power will be considered a joint attack on Russia.

Russian President Vladimir Putin signed on Tuesday a revised nuclear doctrine that lowers the threshhold for the use of weapons. The publication of the document on the Kremlin website on Tuesday coincided with the 1000th day of Russia's full-scale invasion of Ukraine.

In an alarming move, Russian President Vladimir Putin has formally lowered the threshold for his country’s use of nuclear weapons, sending a message to Ukraine and the U.S. with the new terms of the doctrine.

Russia is again threatening the use of nuclear weapons against Ukraine, as the country lowers its own threshold for when it might use those kinds of weapons.

President Vladimir Putin has approved changes to Russia’s nuclear weapons policy, and Moscow has urged the West to study them closely. Putin signed a decree on Tuesday updating Russia’s nuclear doctrine,