So... I guess that’s a reason to test and sell the stuff they worked on since then.
Germany did the same with the BF 109 in Spain, that plane became backbone of the German Luftwaffe’s fighter arm.
Germany developed the Jerry Can in that war too.
Russia and China are woefully deficient in real deployed military experience. They have to get into 4th generation warfare sometime if they want to one day break the US Military in the world sphere.
Our advantage is that we do war really well, to the point no one has had to fight major wars like the US Military. Its incredible to operate oceans away from US mainland.
This could be interpreted as a desperation move by Russia.
If they had rolled right over Ukraine, would they be asking China for help?