Ukraine has begun massing a large number of military troops along the border of Belarus. Possibly a ploy to drag Belarus into conflict, give NATO excuse to enter.
The Belarus National Guard is reporting a heavy buildup of Ukrainian military forces along its border with Ukraine. This includes what is described as "an unprecedented amount of Recon troops."
Ukraine has also "Pre-emptively fortified its border" with Belarus.
There is no stated reason for this sudden development, and thus speculation is rampant.
One speculation is that Ukraine will enter Belarus to take it; then use Belarus as a bargaining chip with Russia to get back Ukrainian land that Russia has taken.
Another speculation is that Ukraine is trying to provoke Belarus into entering the conflict, which would then be used as an excuse for NATO to enter Ukraine. (Except Ukraine is not a NATO member and even if Belarus entered the conflict, it does not give NATO any right to enter.)
Whatever is being cooked-up, is happening fast.
Stay tuned.