What were the factors leading up to the Stonewall riots?

The gays had been fighting for their liberation for quite some time leading up to the Stonewall riots. This included the staged "sip-ins" throughout New York City bars to fight against the rule that only 3 gays were allowed in a bar at any one time. After the "sip-in" the gay rights movement started and more public displays were seen. The police decided that these displays needed to be stopped so they started raiding known gay bars. The raid on Stonewall was not the first or the last raid made by the police. The oppression of the gay people for so long mixed with the increased aggression towards them created friction until it snapped. This release of friction ended with some arrests, injuries to four police officers, more riots, and a lot of growth in gay rights.