Donald Trump is reportedly planning to urge Ukraine to surrender the Donetsk and Luhansk regions as part of negotiations over an end to the war.

As Ukraine’s Volodymyr Zelenskyy heads to Washington, all eyes turn to Donbas, a contested region in Ukraine. Why? Vladimir Putin has demanded this area in exchange for peace in the ongoing Russia-Ukraine war.

The traditionally Russian-speaking area is at the heart of what the Russian president calls the “root causes” of the war, and taking it over is near the top of his list of territorial and political demands.