While similar Russian operations inside Ukraine have been rare, the Ukrainian authorities said on Thursday that one of the S.B.U.’s officers from an elite unit was gunned down in daylight in Ukraine’s ...

In the north a 50,000-strong Russian force is attacking Sumy, a provincial capital. Our model is detecting artillery fire and ...

Even though the Ukrainian battlegroup’s positions are located on heights, Russian fighters deprived it of safe evacuation and retreat routes, squeezing the enemy forces from two sides, Andrey Marochko ...

Artificial intelligence supercharges Ukraine's reconstruction effort in a project called Circularity on the Edge, which ...