Brussels, Belgium: NATO military chiefs were set Wednesday to discuss the details of eventual security guarantees for Ukraine, pushing ahead the flurry of global diplomacy aiming to broker an end to Russia’s war. But even as diplomatic efforts continued Wednesday, Russian forces claimed fresh advances on the ground and Ukrainian officials reported more deaths from Moscow’s missiles. Few details have leaked on the virtual meeting of military chiefs from NATO’s 32 member countries, which is due to start at 2:30 p.m. (1230 GMT).

As western leaders meet, questions remain about the steps they could take to prevent any future Russian aggression

Military chiefs are furiously thrashing out how they could guarantee Ukraine 's security if a deal to end the Russian invasion can be reached. Here we examine the options under…