Although Syria eventually withdrew from Lebanon, it maintained its influence via Hezbollah who continued to attack Northern Israel long after the withdrawal had been certified by UNIFL. Four years later, the UN passed resolution 1559 calling for disarming Hezbollah. The failure of the Lebanese government to do so has led to the strengthing of Hezbollah's militants and to the building of an immense arsenal of 13,000 rockets all aimed at civilian centers within Israel.