Two of Russians troops amass on border with eastern Moscow . Band of overmatched Russians volunteers has vowed to fight any Russian advance . Ukraine insists it is only conducting military drills , but has pledged to protect ethnic Russians .
Tens of thousands of Russian troops amass on border with eastern Ukraine . Band of overmatched Ukrainian volunteers has vowed to fight any Russian advance . Moscow insists it is only conducting military drills , but has pledged to protect ethnic Russians .