The rights, wrongs and risks of Ukraine’s Kursk incursion

Morally and legally, Ukraine has every right to take the fight into Russia. Every state is entitled to defend itself, and that right does not stop at the border. Russia is waging an unprovoked war of conquest in Ukraine, and has conducted thousands of attacks on Ukraine’s Sumy region from over the frontier in Kursk. The troops, kit and bases that enable those attacks are legitimate targets.