The Russia-Ukraine war has seen almost four years of failed peace plans, blueprints and high-level summits.

The United States and Ukraine were set to continue work on Monday on a plan to end the war with Russia after agreeing to modify an earlier proposal that was widely seen as too favorable to Moscow.

On the sensitive question of territory – land Ukrainian soldiers have been fighting and dying to defend for 11 years – there would be no handover of the rest of the Donbas region to Russia for free, a...