Military chief of staff Herzi Halevi had promised that Saturday night's launch of more than 300 missiles, cruise missiles and drones from Iran into Israeli territory "will be met with response", but gave no details. While the attack caused no deaths and little damage, thanks to the air defences and countermeasures of Israel and its allies, it has increased concerns that violence rooted in the Gaza war is spreading, and fears of open war between the long-time foes.