The regiment that doggedly defended a steel mill as Ukraine's last stronghold in the port city of Mariupol completed its mission Monday after more than 260 fighters, including some badly wounded, were evacuated and taken to areas under Russia’s control, Ukrainian officials said. Ukrainian President Volodymyr Zelenskyy said the evacuation to separatist-controlled territory was done to save the lives of the fighters who endured weeks of Russian assaults in the maze of underground passages below the hulking Azovstal steelworks. The steel mill’s defenders got out as Moscow suffered another diplomatic setback in the war, with Sweden joining Finland in deciding to seek NATO membership.