Moscow now has "slightly below" 90% of forces amassed for operation

The shortages have become so acute that some Russian soldiers contracting frostbite due to a lack of appropriate gear

US says Russia lost over 10% of forces sent to Ukraine

US spent up to $7 trillion on contractors, with up to one-third of that money going to just 5 companies

The figure represents as much as half of the Defense Department's $14 trillion expenditure since the war in Afghanistan began in 2001 and the War on Terror went global, according to Brown University's Costs of War Project

Study finds war-zone contractors 'took advantage of' post-9/11 conditions

Unconfirmed videos on social media show significant amounts of Russian military vehicles and armor driving or being freighted into the area

Ukrainian servicemen patrol along a position at the front line with Russia-backed separatists near Avdiivka, Donetsk region

US says Russia lost over 10% of forces sent to Ukraine

Study finds war-zone contractors 'took advantage of' post-9/11 conditions

Pentagon urges Russia to explain troop buildup near Ukraine

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US says Russia lost over 10% of forces sent to Ukraine

Study finds war-zone contractors 'took advantage of' post-9/11 conditions

Pentagon urges Russia to explain troop buildup near Ukraine