The White House on March 25 announced that Ukraine and Russia had agreed to "eliminate the use of force" in the Black Sea, returning the spotlight to a theater of battle that has been relatively quiet for more than a year.

Ukrainian President Volodymyr Zelenskiy said on Thursday Russia's conditions for a ceasefire on the Black Sea were "unrealistic," and that Russia was trying to drag out talks in order to grab more land.

When the U.S. said it had reached an agreement to eliminate the use of force in the Black Sea, it looked like a breakthrough. Then Russia listed its conditions.