The Tailhook scandal refers to a series of incidents where more than 100 U.S. Navy and United States Marine Corps aviation officers were alleged to have sexually assaulted at least 83 women and 7 men, or otherwise engaged in "improper and indecent" conduct at the Las Vegas Hilton in Las Vegas, Nevada. The events took place at the 35th Annual Tailhook Association Symposium from September 8 to 12, 1991. The term can also refer to the resulting investigations conducted by the Department of the Navy and the Inspector General of the Department of Defense.