There is widespread concern that the US has ultimately gotten what it needs from the SDF following the defeat of IS and will, therefore, prioritise its alliance with Turkey — a Nato member.
Both states share a common interest in securing the continued flow of goods to and from their markets, but each country's approach differs in line with their respective national priorities
Its strategic location at the entrance to the Bab al-Mandab Strait has incentivised various countries to establish military bases in the small African nation
Three factors that limit optimism over the deal are Iran's radicals, China's unwillingness to play a more significant security role in the region and Israel's fear over Iran's nuclear programme
If the ceasefire collapses, China has an interest in getting the two sides back to the table, but it would be a difficult task given Tehran's deep mistrust of the US and Israel.
Israel's parliament approved a draconian death penalty law last week that only applies to Palestinian prisoners, in a move that the UN says "would constitute a war crime"