In their fight AGAINST Russia, the Ukrainians are outgunned.
By whom? By the Russians, of course!
The article's title would NOT be improved by replacing "against" with "by."
Regards,
>>>”In their fight AGAINST Russia, the Ukrainians are outgunned.”<<<
Correct
>>>”By whom? By the Russians, of course!”<<<
Correct again. They are outgunned by the Russians.
>>>”The article’s title would NOT be improved by replacing “against” with “by”<<<
Wrong. You just proved my point. “By” not “against” is grammatically correct. Ukraine may be fighting against Russia, but Ukraine is outgunned by Russia.