Ukraine’s bold incursion into Russia’s Kursk Oblast gives the country a much-needed breakthrough on the battlefield, and represents yet another setback for the Kremlin. Yet the operation is not a military game-changer. Even as Ukrainian forces have occupied more than 400 square miles (over 1,000 square kilometers) of Russia, the Russian military has been making significant advances along the front line in Ukraine’s Donbas region and pummeling the country from the air. Neither Russia nor Ukraine