Ukraine has launched a surprise new cross-border incursion into Russia's Kursk region, with battlefield maps showing reported ...

In addition to its operation on the eastern front, Russia began what the ISW describes as its "subordinate main effort" when it crossed the international border to the north of Ukraine's second ...

Ukraine used its northeastern Sumy region as a staging ground for a surprise incursion across the border into Russia's western Kursk region last August. Moscow struggled for several months to ...