evidence: Since 2016, Turkey has also conducted three large-scale military operations into Syria, capturing territory along Syria's northern border in the provinces of Aleppo, Ar Raqqah, and Al Hasakah. Political negotiations between the government and opposition delegations at UN-sponsored Geneva conferences since 2014 have failed to produce a resolution of the conflict. Since early 2017, Iran, Russia, and Turkey have held separate political negotiations outside of UN auspices to attempt to reduce violence in Syria. According to an April 2016 UN estimate, the death toll among Syrian Government forces, opposition forces, and civilians was over 400,000, though other estimates placed the number well over 500,000. As of December 2019, approximately 6 million Syrians were internally displaced. Approximately 11.1 million people were in need of humanitarian assistance across the country, and an additional 5.7 million Syrians were registered refugees in Turkey, Jordan, Iraq, Egypt, and North Africa. The conflict in Syria remains one of the largest humanitarian crises worldwide. [...] against opposition forces and civilians; in addition, France, Jordan, Qatar, Saudi Arabia, and the UK have provided forms of military assistance to opposition forces and/or conducted operations against ISIS, including air strikes