Russia’s full-scale invasion of Ukraine will pass the one-year mark in the coming weeks with no end in sight to what is already the largest European conflict since World War II. Vladimir Putin initially envisaged a small, victorious war that would extinguish Ukrainian independence and force the country back into the Kremlin orbit. Instead, his armies have suffered a series of disastrous defeats that have shattered Russia’s reputation as a military superpower. Despite the difficulties encountered in Ukraine, Putin has little choice but to continue with his invasion. The Russian dictator knows that unless he is able to rescue the...