"In 1990 and 1991, approximately 697,000 U.S. troops were deployed in the Persian Gulf during Operations Desert Shield and Desert Storm. The United States suffered relatively few casualties during the brief air and ground war against Iraq. Since returning home, however, many veterans have developed illnesses that appear to be related to their military service in the Gulf. Researchers caution that it may be impossible to identify the causes of these illnesses because of the absence of baseline data on the health of military personnel and the lack of reliable exposure data. This report provides concise answers to a series of questions concerning Gulf War veterans' illnesses, based on currently available scientific information."
CRS Report for Congress, 97-450