 On 30 November, SOHR reported that government troops abandoned the Omar oilfield east of Deir ez-Zor, which was soon occupied by opposition forces.Only five minor fields west of the city still remained under government control.On 22 November, after 20 days of siege rebels also captured the Mayadin military base from which soldiers evacuated to Deir ez-Zor airbase, thus forcing out any government elements from area spanning from Iraqi city to capitol of the province.