The Al-Qassam Brigades is the military wing of the Hamas organization, which governs the Gaza Strip. Established in the late 1980s, it is named after Izz ad-Din al-Qassam, a Palestinian leader known for his resistance against British rule. The group is involved in armed resistance against Israel and has been designated as a terrorist organization by several countries. The brigades are known for their use of various military tactics, including rocket attacks and tunnel warfare. They have played a significant role in the ongoing Israeli-Palestinian conflict, particularly during periods of heightened violence, such as the Gaza Wars. The group claims to defend Palestinian rights and sovereignty.