A key Russian general who Russian President Vladimir Putin promoted this week views the invasion of Ukraine as a mere "stepping stone" to further conflict with Europe. Putin launched the full-scale invasion of Ukraine in February 2022, sparking fears from many analysts that the Kremlin may have greater ambitions beyond taking control of its former Soviet neighbor. Russian commentators and lawmakers have often heightened those fears with their anti-North Atlantic Treaty Organization (NATO) rhetoric throughout the war—routinely encouraging direct strikes on European and even American targets. This week, Putin promoted Lieutenant General Andrey Mordvichev to the rank of Colonel-General. The...