If you think, like Elon Musk, that instead of fighting, Ukraine and Russia “should agree to a truce,” the recent interview with General Andrey Mordvichev, one of Russia’s top commanders in Ukraine, should give you pause. Asked about the war’s expected duration, he said the quiet part out loud: There is still “plenty of time.” According to him, “If we are talking about Eastern Europe, which we will have to, of course then it will be longer.” In other words, the Kremlin is in the conflict for the long haul. Not only it is committed, as Russian President Vladimir Putin...