winning wars is important in showing that the ruler has power and authority among his army.
winning wars indicates that the king is capable of ruling the country inspite of negative events.
winning wars shows that ruler owns a well developed army and warfare.
winning increases the popularity of ruler which is good for the country's goodwill.
winning shows that the country and the ruler is an emerging one.
wars create unwanted expenses.
wars waste the nation's resources.
wars lead to damages to life and property.
wars make way for future attacks and revenges by enemy countries.
wars lead to the bad name that a country is not peaceful and less tourist attraction.