Indonesian forces invaded Oecusse on 6 June 1975. In October they occupied the western border districts of East Timor's main territory. It was in Pante Macassar that an Indonesian fifth column raised the Indonesian flag on 29 November 1975, a week before the official Indonesian invasion of East Timor proper. However, even under Indonesian rule, Oecusse was administered as part of the province of East Timor, as it had been as part of Portuguese Timor. Like much of the country, it suffered violent attacks near the 1999 referendum for independence. Over 90 percent of the infrastructure was destroyed. It became part of the independent state of East Timor on 20 May 2002.