http://en.wikipedia.org/wiki/Crime_against_peace
"A crime against peace, in international law, refers to "planning, preparation, initiation, or waging of wars of aggression, or a war in violation of international treaties, agreements or assurances, or participation in a common plan or conspiracy for the accomplishment of any of the foregoing" "
US military law:
"498. Crimes Under International Law Any person, whether a member of the armed forces or a civilian, who commits an act which constitutes a crime under international law is responsible therefor and liable to punishment. Such offenses in connection with war comprise:
a. Crimes against peace.
b. Crimes against humanity.
c. War crimes."
"A crime against peace, in international law, refers to "planning, preparation, initiation, or waging of wars of aggression, or a war in violation of international treaties, agreements or assurances, or participation in a common plan or conspiracy for the accomplishment of any of the foregoing" "
US military law:
"498. Crimes Under International Law Any person, whether a member of the armed forces or a civilian, who commits an act which constitutes a crime under international law is responsible therefor and liable to punishment. Such offenses in connection with war comprise:
a. Crimes against peace.
b. Crimes against humanity.
c. War crimes."