The ISIS franchise in Libya, the self-declared "Islamic State in Cyrenaica," was largely driven from the eastern city of Derna last week, although fighting continues in one neighborhood that remains under ISIS control. The offensive against ISIS is apparently being led by the Abu Salim Martyrs Brigade, linked to the local Mujahedeen Shura Council, one of the more radical elements in the Libyan Dawn coalition. Confusingly, one of the militias allied with with the Abu Salim brigade is named as Ansar al-Sharia, which had previously been described as an ISIS affiliate. The fighting erupted on June 9 after ISIS militants assassinated Nasser Aker (also rendered Nasir Atiyah al-Akar), a senior figure in the Shura Council. The battle seems to represent a struggle between jihadists loyal to ISIS and al-Qaeda. In any case, it represents a jihadist enclave opening in Libya's east, heretofore under control of the secular-leaning "official" government now based in Tobruk, the next major town to the east of Derna. (See map) (AFP, June 21; IBT, June 15; Long War Journal, June 14)