Rubuta ci gaba don wannan sakin layi - An kafa Hamas a hukumance ba da daɗewa ba, a ranar 14 ga Disamba, 1987, ta kafa wasu cibiyoyi masu kama da "al-Mujahidun al-Filastiniun", kamar su Abdullah Azzam Brigades. A tsakiyar shekarar 1991, a lokacin Farkon Intifada na Falasdinawa
(1987-1994), An kafa Brigades na Izz ad-Din al-Qassam don samarwa Hamas da karfin soja, daga nan aka san shi da reshen Hamas.