Putin seems to be winning. Russian forces are pushing ahead in Ukraine. President-elect Donald J. Trump is returning to the White House. War fatigue is spreading across Europe. North Korean troops have boosted the ranks of his army.

Ukraine’s parliament has canceled a session as security was tightened after Russia deployed a new ballistic missile that threatens to escalate the nearly three-year war.

Russian President Vladimir Putin said his forces may use a new missile again after targeting Ukraine in retaliation for Kyiv’s use of American and British-made weapons on Russian territory this week.