Ukraine did not disclose preparations for an operation in Russia’s Kursk Oblast to Kyiv’s allies because the world might consider it crossing Russia’s “strictest of all red lines,” President Volodymyr Zelensky said on Aug. 19. Two weeks into Ukraine’s cross-border offensivein Kursk Oblast, Ukrainian troops control over 1,250 square kilometers of Russian territory and 92 settlements in the region while continuing to strengthen their positions, Zelensky claimed. According to the president, the concept of so-called Russia’s red lines, “which dominated the assessment of the war by some partners,” …