https://www.npr.org/2023/03/25/1166089485/putin-russia-tactical-nuclear-weapons-belarus
MOSCOW — Russian President Vladimir Putin announced plans on Saturday to station tactical nuclear weapons in neighboring Belarus, a warning to the West as it steps up military support for Ukraine.
Putin said the move was triggered by Britain's decision this past week to provide Ukraine with armor-piercing rounds containing depleted uranium.
Tactical nuclear weapons are intended for use on the battlefield and have a short range and a low yield compared with much more powerful nuclear warheads fitted to long-range missiles. Russia plans to maintain control over those it sends to Belarus, and construction of storage facilities for them will be completed by July 1, Putin said.