Both sides might have violated the first Minsk agreement. As to who violated it first? My understanding was that Ukraine did. Eventually it broke down. As for the second, it depends whether you consider an omission as bad as an action. Ukraine violated Minsk II by ignoring it, which led to the SMO: …yale.edu/…/frustrated-refusals-give-russia-secur…. Interestingly, France and Germany were part of these talks and officials have stated that they only ever intended to delay a war to better arm Ukraine; i.e. the NATO/Ukrainian side never intended to honour the agreement from the beginning.