Looks like a few instances are having issues

http://lemmystatus.org/

I’m not up to snuff on NATO regulations. As I understand it, if a NATO nation gets attacked, the rest of them are obliged to defend, correct? What happens if that nation is “the aggressor”. Like in this situation if Poland were to do a first strike against Belarus or Russia and they respond attacking Poland, is the rest of NATO obliged to help defend Poland?