Answer:
Balance of power
A situation in which states of the world have roughly equal power.
The power held by a small group when larger groups are of equal strength.
Entente
A friendly understanding or informal alliance between states or fractions.
Balkans
The word Balkan is Turkish and means"mountain".
Balkans, also called Balkan Peninsula, easternmost of Europe’s three great southern peninsulas. There is not universal agreement on the region’s components.
Nationalism
identification with one's own national and support for its interest,especially to its exclusion or detriment of the interest of other nations.
Ethic
moral principles especially one relating or affirming a specified group ,field or form of conduct.
Spark
a small amount of a quality or intense feeling