Following Croatian military success against the RSK during Operation Storm in August, and in Bosnia and Herzegovina against the Republika Srpska during Operation Mistral 2 in September, US President Bill Clinton announced a new peace initiative for Bosnia and Herzegovina. This initiative, which aimed to restore eastern Slavonia to Croatia, was based on Croatian sovereignty and the Z-4 Plan. Gailbraith sought to reconcile the plan with new circumstances in the field; an example was limited self-government for Croatian Serbs in eastern Slavonian municipalities where they comprised a majority of the 1991 population; after Croatia objected, the proposal was replaced with provisions from the Constitution of Croatia. By early October the process led to the Erdut Agreement, establishing a framework for restoring eastern Slavonia to Croatian rule. When the agreement was first implemented in 1996, there were concerns in Croatia that the process might result in "covert" implementation of the Z-4 Plan in eastern Slavonia and political autonomy for the region.