Civil disobedience during the late 1960s and early 70s was prevalent throughout the United States. The City of Anaheim was not spared their share of these disturbances. On August 6, 1970, Disneyland was the unlikely location for an event referred to as "Yippie Day." On this day a group of Yippies obtained entrance to Disneyland. They ran rampant over the park, attempting to claim "Tom Sawyer's Island" for themselves. Known as Yippies, the group managed to take over Tom Sawyers Island and raise the Viet Cong flag, while smoking pot. The Yippies planned the stunt as an attack on what they saw as bloated establishment decadence. Thousands of flyers were being distributed, and advertisements were placed, in the Los Angeles Free Press inviting "Yippies" to attend the First International "Yippie Pow Wow." In their leaflets, they stated they would help "liberate" Minnie Mouse, arrange a Black Panther Breakfast at the now-closed Aunt Jemima Pancake House, and attack the Bank of America on Main Street, USA and the attraction it's a small world, which Bank of America sponsored. Warned that Disneyland would not allow the Yippies admission to the park without a ticket, the coordinators encouraged people to "tear down the walls?. Disneyland, not knowing how to handle this breach of customary etiquette, called in the Orange County Police who arrived in full riot gear. The Anaheim police Department prepared for a major confrontation, working with their strategy for the unauthorized visitation of an anticipated crowd of 20,000 plus Yippies to the Magic Kingdom. On the morning of August 6, 1970, Anaheim Police and Disneyland personnel were prepared for the Yippie take-over. As the gates opened, 300 Yippies made their way into the park. Anaheim Police waited in riot formation behind Main Street while Disneyland administrators and cast members dealt with the small group of unruly hippies. The Yippies also received an unexpected confrontation from regular park guests. The Yippies tried to gain unity in an attempt to disrupt park activity and cause damage to the park. As park guests watched and cheered, hundreds of police officers marched onto Main Street in formation and began their slow and deliberate sweep to clear the unruly crowd. Instead of departing, the Yippies broke up and spread throughout the park. Police remained in formation on Main Street as Disneyland personnel cleared the park section by section and declared the park closed for the day. This was the first time the park was closed early. Disneyland was officially closed at 7:10 p.m. but police continued to deal with Yippies on surrounding properties. It was not until 11:50 p.m. that they were allowed to leave. For many years afterward Disneyland selectively enforced a "dress code" at the park, occasionally refusing admission to "long-haired hippies". Earlier Disneyland was infamous for its policy of refusing entry to young men wearing beards, a common practice in California. The Yippie incident is the only time an outside security force has made a full-blown public appearance in The Happiest Place on Earth.