evidence: Territorial control in Syria has changed many times since the country's uprising began more than four years ago, with long periods of attrition characterising the conflict. [...] Elsewhere, primarily moderate Syrian rebels have made gains in the southern cities of Deraa and Quneitra, where groups have remained relatively united. In June, they seized the Syrian government's largest military base in Deraa, though this is far from the rebels' stated goal of reaching rural Damascus.