http://www.planetout.com/news/article.html?2006/06/22/4

Excerpt:
Although Gene Compton's eatery in the seedy Tenderloin district of San Francisco was a haven for gay men, lesbians and transgender people, police harassment was nonetheless a common occurrence. On an evening in August, 1966, an officer entered and grabbed one of the "queens," who threw a cup of coffee in his face. Mayhem erupted as drag queens kicked the cops with their high-heeled shoes. Rioters smashed windows, broke furniture and set fire to a car. The event lasted a day, and picketing lasted several more days.
[...]
"Forty years ago, female impersonation was illegal, and you could even be arrested for wearing buttons on the wrong side of your shirt," Chung said. "In many ways, we can attribute our success in the transgender civil rights movement and the larger LGBT movement to our courageous predecessors at Compton's Cafeteria."

Don't forget the stonewall riots

https://www.susans.org/wiki/Stonewall_riots

Predates Stonewall and there is a mention in the article.

Ther is an emmy award winning movie concerning this TLBG event.
Called Screaming Queens 
Produced by Victor Silverman, Professor of History, Pomona College

https://www.susans.org/Events/3091.html

It has been showing on Public Broadcasting System on selected stations during the month of june to honer Pride Month.  i think only public stations at...
Detroit, MI
Springfield, IL
Huntington Beach, CA
San Francisco, CA
New York, NY
have remaining scheduled dates.

Kate