Pro-Russian separatists vowed Feb. 2 to mobilise up to 100,000 fighters for their latest east Ukraine offensive as the US mulled sending weapons to Kiev's out-gunned forces after the latest truce bid collapsed.
The ambitious pledge to dramatically escalate a nine-month conflict that has already left at least 5,100 people dead came as the rebels battled to encircle beleaguered transport hub Debaltseve.
The ambitious pledge to dramatically escalate a nine-month conflict that has already left at least 5,100 people dead came as the rebels battled to encircle beleaguered transport hub Debaltseve.

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