The Kellogg- Briand pact consisted of 15 nations. The point of the pact was to denounce war as a method to solving disputes. The Locarno Pact only had Britain, France, Belgium, Italy, and Germany sign. This guaranteed boarders to be set in Europe. It also Demilitarized the Rhineland which brought more security to the east.
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"It is accordance with our determination to refrain from aggression and build up a sentiment and practice among nations more favora ble to peace ... that we have incurred the consent of fourteen important nations to the negotiation of a treaty condemning recourse to war, renouncing it as an instrument of national policy." -Calvin Coolidge