Wrong. Cathay entered the war to take Colasan. This was made crystal clear when Cathay, on multiple occasions, offered to exit the war and abandon OW to their fate if only we would let them have Colasan. It wasn't about OW. No one cared about OW. Ever. PoZ, Arcaea, and even GDD were all quite explicit in that they were entering the war due to Coralynth's false/misleading (your choice of interpretation) statements regarding the attack.
Actually, Velax did sell part of our support of OW as a promise he'd made to OW that we would protect them. Coralynth's actions made for a catalyst to get the nobility to actually care about keeping the promise. (So you're effectively right, but there's that little extra that was missing.)
If you had better control of your noble's encounter settings, you could halved waltzed through Colasan and attacked Sorraine, forcing GDD to be the ones to declare the war. Try talking to Tara about it. They've gotten really good at using encounter settings to control whether or not battles happen.
I got a good chuckle out of this.
