1934: In Germany, approximately 300 Nazi Party members are arrested and murdered in a purge ordered by Adolf Hitler that comes to be known as the Night of the Long Knives. The most prominent victim of the purge is SA (Brown Shirts) chief Ernst Rohm, a gay man whom Hitler accuses of having formed a subversive “homosexual clique.” One year later to the day, the government enacts new, stricter legislation against male same-sex eroticism, partly formalizing the ongoing Nazi persecution of gay men.
Source: http://www.thelavendereffect.org/2013/06/28/june-28-in-lgbtq-history/