Gajah Mada delivered an oath called Sumpah Palapa, in which he vowed not to eat any food containing spices until he had conquered all of Nusantara under the glory of Majapahit.
Furthermore, in 1275, the term Cakravala Mandala Dvipantara was used by him to describe the aspiration of united Southeast Asian archipelago under Singhasari and marked the beginning of his efforts to achieve it.
[6][7] Kertanegara envisioned the union of Southeast Asian maritime kingdoms and polities under Singhasari as a bulwark against the rise of the expansionist Mongol-led Yuan dynasty of China.
[8] In a wider sense, Nusantara in modern language usage includes Austronesian-related cultural and linguistic lands, namely, Indonesia, Malaysia, Singapore, Southern Thailand, the Philippines, Brunei, East Timor and Taiwan, while excluding Papua New Guinea.
[18]In 1920, Ernest Francois Eugene Douwes Dekker (1879–1950), also known as Setiabudi, proposed Nusantara as a name for the independent country of Indonesia which did not contain any words etymologically related to the name of India or the Indies.
In a more scholarly manner without national borders, Nusantara in a modern language usage "refers to the sphere of influence of the Austronesian-related cultural and linguistic islands that comprise Indonesia, Malaysia, Singapore, the southernmost part of Thailand, the Philippines, Brunei, East Timor and perhaps even Taiwan, but it does not involve the areas of Papua New Guinea.