Izz ad-Din al-Qassam
The Izz ad-Din al-Qassam Brigades (; often shortened to IQB or Al-Qassam Brigades)—also spelt Izzedine or Ezzedeen Al-Qassam Brigades, EQB)—named after Izz ad-Din al-Qassam, is the military wing of the Palestinian organization Hamas. Currently led by Mohammed Deif and its deputy, Marwan Issa, IQB is the largest and best-equipped group operating within Gaza today.