evidence: Malaysia's maritime territory in the South China Sea encompasses twelve features, be they islands, rocks, reefs, shoals and atolls in the Spratly Islands. Malaysia maintains a physical presence on five of the features. These are Pulau Layang-Layang (Swallow Reef), Terumbu Mantanani (Mariveles Reef), Terumbu Ubi (Ardasier Reef), Terumbu Siput (Erica Reef), and Terumbu Peninjau (Investigator Reef). Two other features, though lying within Malaysia's claims, are occupied by the Philippines and Vietnam, with the Philippines occupying Terumbu Laksamana (Commodore Reef) and the Vietnamese occupying Pulau Amboyna Kecil (Amboyna Cay). Malaysian special forces actually landed on Pulau Amboyna in 1978 and placed markers, but the Vietnamese who subsequently occupied the feature destroyed them. Malaysia then began a series of gradual claims of several positions in the area beginning in May 1983 when special forces personnel occupied Pulau Layang-Layang (Swallow Reef). The full details of the developments of these military outposts will be discussed later in the chapter.