This market resolves to NO in the day Wikipedia and the mainstream media reports the end of the armed conflict in Ukraine in this article: https://en.wikipedia.org/wiki/Russian_invasion_of_Ukraine
The purpose of this market is to know whether the European Union will stick with Ukraine until the end.
This market resolves to YES if at any time we see signs that Brussels is actively pushing Kyiv to accept a status quo lesser than the one they had in February 23rd 2022. This would mean:
Reducing substancially their military aid to Ukraine
Forcing Ukraine to lose territory, like Luhansk, Donetsk, Kherson, and Zaporizhzhia
Ultimating Kyiv with a deadline to end the war
Making declarations they're removing support for Ukraine
Removing sanctions from Russia
Removing their invitation for Ukraine to join the EU
The list goes on
This market requires significant judgement. I won't bet. I'll rely in the mainstream media's wording and in the Wikipedia.