The risk of inadvertent nuclear escalation due to actions in the conventional domain is a serious, and underrated, feature of the current stand-off between NATO and Russia, following Russia’s 2022 invasion of Ukraine. This brief by HCSS analysts Paul van Hooft, Davis Ellison, and Tim Sweijs notes that NATO leaders and armed forces need to be conscious of unintended signals that can follow the placement of weapons, the movement of forces, and support to Ukraine, especially considering the deteriorating state of Russian armed forces.