"Everything is about Russia taking back territory that was historically Soviet."
Putin can't afford to cut pensions, salaries and social subsidies to continue financing his hybrid wars.
President Petro Poroshenko warned that Russian-backed separatists have a vast military stockpile.
Ukrainians worry that allies will put Russian cooperation in Syria ahead of the Ukraine conflict.
The Russian leader appeared to make a rare admission on Ukraine.
Kiev's SBU claims a Ukrainian national was attempting to recruit a double agent in the army.
Kremlin agents are trying to undermine an honest account of how the plane was shot down over Donbas.
Tank and artillery were allegedly used by Russian-backed forces despite pledges to halt hostilities at midnight.
Kiev's military intelligence posted photos of the man's Russian ID.
I can hear the thunder and see the flashes of light. The people in war's path are nothing more to me than twinkling city lights.
The Russian leader announced he will return to four-way talks.
A Ukrainian national was arrested driving into rebel-held Horlivka with hidden cash.
Two years after being expelled from their university by Russian-backed separatists, classes resumed.
The Russian exercises are like the smoke screens before the stealth invasions of Georgia and Crimea.
Soldiers use an app on a tablet to plot enemy artillery positions on a Google Earth map of the battlespace.
Kiev estimates tanks in rebel areas increased from 30 to 600 since 2014.
When NATO deployed three battalions from the Baltic to the Black Sea, Putin countered with three divisions.
The social media pages of Ukraine's security forces were hijacked on Independence Day.
Putin's seizure of Crimea and his war in the Donbas have fostered a patriotism that is driving Ukraine toward the EU.