The role of war correspondents in the Gulf War would prove to be quite different from their role in Vietnam. The Pentagon blamed the media for the loss of the Vietnam war, and prominent military leaders did not believe the United States could sustain a prolonged and heavily televised war. As a result, numerous restrictions were placed on the activities of correspondents covering the war in the Gulf. Journalists allowed to accompany the troops were organized into "pools", where small groups were escorted into combat zones by US troops and allowed to share their findings later. Those who attempted to strike out on their own and operate outside the pool system claim to have found themselves obstructed directly or indirectly by the military, with passport visas revoked and photographs and notes taken by force from journalists while US forces observed.