In the United States LGBT people are allowed to serve openly in the United States military. [ citation needed ] Military policy and legislation had previously entirely prohibited gay individuals from serving, and subsequently from serving openly, but these prohibitions were ended in September 2011 after the United States Congress voted to repeal the policy. The first time homosexuals were differentiated from non-homosexuals in the military literature was in revised army mobilization regulations in 1942. Additional policy revisions in 1944 and 1947 further codified the ban. Throughout the next few decades, homosexuals were routinely discharged, regardless of whether they had engaged in sexual conduct while serving. In response to the gay rights movements of the 1970s and 1980s, the Department of Defense issued a 1982 policy (DOD Directive ) stating that homosexuality was clearly incompatible with military service. Controversy over this policy created political pressure to amend the policy, with socially liberal efforts seeking a repeal of the ban and socially conservative groups wishing to reinforce it by statute.