The strange history of the now abandoned American 1993-bill, «Don't ask, don't tell» where sexual orientation was a "non-talk" policy in the American forces, leading to 13.368 getting kicked out before 2011.
1999
1933
1978
2006
2008
2016
1976
2015
2017
2000
1990
1975
1949
2009
1993