"Don't ask, don't tell" (DADT) was the official United States policy on military service by gays, bisexuals, and lesbians, instituted by the Clinton Administration on February 28, 1994, when Department of Defense Directive 1304.26 issued on December 21, 1993, took effect,[1] lasting until September 20, 2011.
The act prohibited any homosexual or bisexual person from disclosing their sexual orientation or from speaking about any homosexual relationships, including marriages or other familial attributes, while serving in the United States armed forces. The act specified that service members who disclose that they are homosexual or engage in homosexual conduct should be separated (discharged) except when a service member's conduct was "for the purpose of avoiding or terminating military service" or when it "would not be in the best interest of the armed forces". Since DADT ended in 2011, persons who are openly homosexual and bisexual have been able to serve.
The "don't ask" part of the DADT policy specified that superiors should not initiate investigation of a service member's orientation without witnessing disallowed behaviors, though credible evidence of homosexual behavior could be used to initiate an investigation. Unauthorized investigations and harassment of suspected servicemen and women led to an expansion of the policy to "don't ask, don't tell, don't pursue, don't harass".
