Hamas is a Palestinian Islamist political and militant group. It was founded in 1987 during the First Intifada against Israeli rule in the occupied territories. Hamas has both political and military wings and is considered a terrorist organization by several countries, including the United States, the European Union, and Israel. The conflict between Hamas and Israel, particularly in Gaza, involves complex historical, political, and territorial factors. The key issues include the Israeli-Palestinian conflict, the status of Jerusalem, the right of return for Palestinian refugees, and control over territories, among others. Hamas has been involved in armed resistance against Israel, including rocket attacks and suicide bombings. The conflict often escalates with periodic outbreaks of violence, leading to military confrontations between Hamas and the Israeli military. The situation is highly sensitive, and attempts to find a lasting resolution to the Israeli-Palestinian conflict continue to be a significant international challenge.