Libya is tipping toward all-out civil war as rival militias take sides for and against an attempted coup led by a renegade general that has pushed the central government towards disintegration. In a move likely to deepen the crisis, the army chief of staff, whose regular forces are weak and ill-armed, called on Islamist-led militias to help preserve the government. His call came after forces commanded by General Khalifa Hifter stormed the parliament building in Tripoli at the weekend, after earlier attacking Islamist militia camps in Benghazi. The fighting has been the heaviest since the overthrow of Muammar...