Seeing the treaty as trampled, Bulgaria was dissatisfied over the division of the spoils in Macedonia (made in secret by its former allies, Serbia and Greece) and commenced military action against them.
Nähes lepingu jalge alla trampimist, oli Bulgaaria rahulolematu Makedoonia jagamise üle (tehtud salaja endiste liitlaste, Serbia ja Kreeka poolt) ja alustas nende vastu sõjategevust.