Conflicts or disputes between two countries that have significant differences in terms of resources (population, financial, power, support and so on), are very difficult to resolve by market mechanism (ie bargaining power among them), If offered too high and the requested is too low then the balance will not happen. So what should be done is the presence of other forces outside the two countries, and that is the mediator (individual country or international institution). The mediators are those who have a significant relationship with the two conflicting countries. Aceh (one of the Indonesian provinces), has been in conflict with the country (Indonesia), and it has been going on for a very long time (+/- 30 years), many victims falling on both sides. The strength of the two is very different (population, financial, power, support and others). Market-based negotiation efforts are unsuccessful. But then completed with the mediation mechanism of other countries that are more independent and have strong pressing power. Until now Aceh is safe.