Yevgeny Prigozhin in Saint Petersburg, Russia, on August 9, 2016.

Mikhail Svetlov/Getty Images

Russia's Wagner Group has been fighting on the front lines in Bakhmut, Ukraine. Founder Yevgeny Prigozhin said he wants to capture it because of its "underground cities." Prigozhin is referring to a vast network of caves and salt mines underneath the city. 

In recent weeks, mercenaries from the Wagner paramilitary group have been fighting a bloody battle on the front lines in Bakhmut, eastern...

Continue Reading Wagner chief says he wants to seize a key Ukrainian city for its vast network of caves and tunnels that could be used to war