On the 1000th day of Russia’s invasion of Ukraine, President Vladimir Putin signed a revised nuclear doctrine that lowers the threshold for the use of nuclear weapons. The move comes amid escalating tensions and a significant shift in the dynamics of the ongoing conflict, particularly with the recent approval by US President Joe Biden for Ukraine to use long-range missiles supplied by the US to strike deep into Russian territory. This updated nuclear doctrine serves as a clear signal from the Kremlin regarding its stance on the use of nuclear weapons in the context of the war, raising concerns over potential escalation.