Bing found the following results
Donbas - Wikipedia
The Battle for Donbas - The New York Times
Donbas | Map, Region, Ukraine, & War | Britannica
The Battle for the Donbas - The New York Times
Donbas: Why Russia is trying to capture eastern Ukraine - BBC
Why Donbas is at the heart of the Ukraine crisis | CNN
Donbas: Battle in east Ukraine expected to be bloody and decisive
The battle for Donbas: What's behind Russia's new Ukraine offensive
The ‘Wild Field’ Where Putin Sowed the Seeds of War
Ukraine: Facing the Russian Army on the front line in Donbas - BBC