From The Art and Popular Culture Encyclopedia
"Hundreds of young men went on a rampage in Greenwich Village, shortly after 3 A.M. yesterday after a force of plain-clothes men raided a bar that the police said was well known for its homo-sexual clientele.
Thirteen persons were arrested and four policemen injured. The young men threw bricks, bottles, garbage, pennies and a parking meter at the policemen, who had a search warrant authorizing them in investigate reports that liquor was sold illegally at the bar, the Stonewall Inn, 53 Christopher Street, just off Sheridan Square."--New York Times, June 29, 1969
A police raid is an unexpected visit by police or other law-enforcement officers with the aim of using the element of surprise in order to seize evidence or arrest suspects believed to be likely to hide evidence, resist arrest, be politically sensitive, or simply be elsewhere during the day.