<P> While the peacekeeping force is being assembled, a variety of diplomatic activities are being undertaken by UN staff . The exact size and strength of the force must be agreed to by the government of the nation whose territory the conflict is on . The Rules of Engagement must be developed and approved by both the parties involved and the Security Council . These give the specific mandate and scope of the mission (e.g. when may the peacekeepers, if armed, use force, and where may they go within the host nation). Often, it will be mandated that peacekeepers have host government minders with them whenever they leave their base . This complexity has caused problems in the field . </P> <P> When all agreements are in place, the required personnel are assembled, and final approval has been given by the Security Council, the peacekeepers are deployed to the region in question . </P> <P> The financial resources of UN Peacekeeping operations are the collective responsibility of UN Member States . Decisions about the establishment, maintenance or expansion of peacekeeping operations are taken by the Security Council . According to UN Charter every Member State is legally obligated to pay their respective share for peacekeeping . Peacekeeping expenses are divided by the General Assembly based upon a formula established by Member States which takes into account the relative economic wealth of Member States among other things . In 2017, the UN agreed to reduce the peacekeeping budget by $600 million after the US initially proposed a larger cut of approximately $900 million . </P> <Table> <Tr> <Th> Year </Th> <Th> Funding sources by country / source </Th> <Th> Description </Th> <Th> Total </Th> </Tr> <Tr> <Td> 2015 - 2016 </Td> <Td> </Td> <Td> </Td> <Td> $8.3 bn </Td> </Tr> <Tr> <Td> 2016 - 2017 </Td> <Td> US 28.57% <P> China 10.29% Japan 9.68% Germany 6.39% France 6.31% United Kingdom 5.80% Russian Federation 4.01% Italy 3.75% Canada 2.92% Spain 2.44% </P> </Td> <Td> Less than 0.5% of world military expenditures (estimated at $1,747 billion in 2013). The resources financed 14 of the 16 United Nations peacekeeping missions with the two remaining ones getting financed through the UN regular budget . <P> Many countries have also voluntarily made additional resources available to support UN Peacekeeping efforts such as by transportation, supplies, personnel and financial contributions beyond their assessed share of peacekeeping costs . </P> </Td> <Td> $7.87 bn </Td> </Tr> <Tr> <Td> 2017 - 2018 </Td> <Td> </Td> <Td> While many have praised the Ivory Coast UN peacekeeping mission's stabilizing effects on the country, the mission was ended on 30 June 2017 . </Td> <Td> $7.3 bn </Td> </Tr> </Table>

Role of uno in maintaining world peace wikipedia