 The Treaty of Union, League, and Perpetual Confederation drawn up at that congress would have bound all parties to mutual defense and to the peaceful settlement of disputes.Furthermore, because some feared that monarchical elements sympathetic to Spain and its allies might regain control of one of the new republics, the treaty included a provision that if a member state substantially changed its form of government, it would be excluded from the confederation and could be readmitted only with the unanimous consent of all other members.The treaty was ratified only by Colombia and never became effective.