Russia is align with all the countries mentioned in Ezekiel 39 for this war, just before the Tribulation..
Eventually, they line up to attack Israel.. My guess is because Israel appears to bigger in size in the End times.. So I am surmising they take over some of the countries immediately surrounding them, as the countries that end up attacking them in this prophecy are not their border neighbors..
And I am guessing maybe due to Russia taking over various lands, potentially, this leads Israel to also take over a few lands as a strategic defense..
And having taken over some muslim countries around it, this gives lots of motivation to the many countries that end up attacking them (as they are almost muslim countries).