Russia's Campaign in Donetsk
Russia aims to use Donetsk as a threat launchpad.
Donetsk lost 70% control before 2014.
Over 4 million residents in Donetsk, a quarter of displaced.
Rivers and villages favor defenders in fighting.
Ukraine resists defending every held inch.
Donetsk's fall risks national instability.
Kherson requires crossing the Dnipro River.
Zaporizhzhia terrain limits Russian advances.
Russia will stop where force stops.
4 weeks ago