 The Marsh Arab resistance was led by the Hezbollah Movement in Iraq (completely unrelated to the Hezbollah of Lebanon), which after 2003 became the Marsh Arabs' main political party.On July 10, 1991, the United Nations announced plans to open a humanitarian center at Lake Hammar to care for those hiding out in the southern marshlands, but Iraqi forces did not allow UN relief workers into the marshlands or the people out.A large scale government offensive attack against the refugees estimated 10,000 fighters and 200,000 displaced persons hiding in the marshes began in March–April 1992, using fixed-wing aircraft; a U.S. Department of State report claimed that Iraq dumped toxic chemicals in the waters in an effort to drive out the opposition.