The island was originally part of the city of Portland, which re-evaluated property taxes in 1990. Due in part to high real estate prices paid by out-of-state residents and property aesthetic values, property taxes increased substantially. Many residents felt this move created an unfair discrepancy between the money paid to the City of Portland and the services they received in return. The island voted to secede from Portland, and on July 1, 1993, the island was declared the Town of Long Island. The Long Island Historical Society now houses every news article that was printed about the secession movement as well as video and film footage of the secession ceremonies. These archives also include copies of the local and national news coverage given to the community during its "rebellion".