Original sentence: Both Morocco and Polisario have sought to boost their claims by accumulating formal recognition, from largely minor states.In both instances, recognitions have over the past two decades been extended and withdrawn according to changing international trends.Internationally, major powers such as the United States have taken a generally ambiguous and neutral position on each side's claims, and have pressed both parties to agree on a peaceful resolution.Polisario has won formal recognition for SADR from roughly 45 states, and was extended membership in the African Union, while Morocco  has won formal recognition for its position from 25 states, as well as the membership of the Arab League.Since a United Nations-sponsored ceasefire agreement in 1991, most of the territory has been controlled by Morocco, with the remainder under the control of the Polisario/SADR, backed by Algeria
Edited sentence: Internationally, major powers such as the United States and France have been acting as the UN Resolutions supporting the right of Sahrawi people to self-determination never existed.Polisario have sought to boost their claims by accumulating formal recognition for SADR, from 81 States [80 until 1980; in 2005 Uruguay enters the list], and was extended membership in the African Union, while Morocco  has won informal recognition [the formality is given by the UN] just from the Arab League...Since a United Nations-sponsored ceasefire agreement in 1991, most of the territory has been military occupied by Morocco, with the remainder under the control of the Polisario/SADR, backed by Algeria.The United Nations have issued more than 70 Resolutions denying any title for Moroccan Kingdom in the area