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.

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.

The deal, if Ukraine agrees, would spare energy infrastructure from attacks, but falls short of a broader pause on fighting.