On Tuesday, August 6, the Russo-Ukrainian War took an unexpected twist with the beginning of a brigade-level Ukrainian assault on Kursk Oblast, across the border from Ukrainian Sumy. The decision by Ukrainian command to willingly open up a new front, at a time when their defenses on critical axes of the Donbas are failing, is both aggressive and fraught with peril. The sensational spectacle of a Ukrainian offensive into prewar Russia in a region that is operationally remote from the critical theater of the war has whipped the peanut gallery into a frenzy, and most commentators and observers seem to...