Indonesia's relations with the international community were strained as a result of its invasion of neighbouring East Timor in December 1975, the subsequent annexation and occupation, the independence referendum in 1999 and the resulting violence afterwards. As one of the founding members of Association of Southeast Asian Nations (ASEAN), established in 1967, and also as the largest country in Southeast Asia, Indonesia has put ASEAN as the cornerstone of its foreign policy and outlook. After the transformation from Suharto's regime to a relatively open and democratic country in the 21st century, Indonesia today exercises its influence to promote co-operation, development, democracy, security, peace and stability in the region through its leadership in ASEAN.