Ukraine’s Donbas, consisting of Donetsk and Luhansk, is at the heart of Moscow’s goals. An industrial powerhouse in the Soviet era, it also has rich farmland, important rivers and a coastline on the Sea of Azov.

Ahead of his meeting with European leaders Monday, Trump put pressure on Ukrainian President Volodymyr Zelenskiy to end the invasion of his own country by handing over seized territory and dropping his dreams of belonging to the powerful military alliance.