Matthew Luxmore

But it's only a matter of question before Russia also feels much more strongly about

the strain of the fighting.

And for Ukraine, it does have serious manpower issues.

And Ukraine really is reliant on the financial lifeline and also the military aid lifeline from the West.

And it can't keep this up forever.

So, yes, it has turned into a war of attrition, essentially, which side buckles first.

But now...

You know, it's been going on for four years and neither side has buckled so far.

And both sides say that they can keep this going if they have to.

Journal foreign correspondent Matthew Luxmore.