When Russian President Vladimir Putin ordered up to 200,000 soldiers into Ukraine, his aim was to sweep into the capital, Kyiv, in a matter of days. He wanted to overthrow the pro-Western government and return Ukraine to Russia's sphere of influence.

Zelenskiy, who had agreed to the full 30-day ceasefire, said after the Putin-Trump call that he would support the limited ceasefire, but urged the world to block any attempts by Moscow to drag out the war.

After Moscow and Kyiv agree to stop hitting each other's power plants and electric grids, negotiators will try to halt fighting on the Black Sea.