NATO estimates that 1,000 Russian soldiers are in Ukraine, aiding pro-Russian separatists in the country's east. In a blunt statement Aug. 29, NATO said Russian troops have "illegally crossed the border" as part of a "dangerous pattern over many months" to destabilize its neighbor.
Russia's War Against Ukraine
USA Today: What you need to know about Ukraine-Russia conflict
Ukrainian soldiers train at the military camp near Odesa.
