Borneo

Surrounded by the South China Sea, the Sulu and Celebes seas, the Makassar Strait, and the Java Sea, Borneo is the largest island in the Malay Archipelago, and the third largest island in the world. Much of its 290,000 square miles are covered with dense rainforests that drain into rivers such as the Rejang and Kapuas, which are important sources of trade and local commerce. With the exception of the rivers, only navigable in small craft, the terrain is almost impassable. The highest point of Borneo is the peak of Mount Kinabalu, reaching a height of 13,455 feet. A host of diverse animals makes their homes in the island’s hot and humid environment, including elephant, deer, orangutan, gibbon, crocodile, Malay bear, and a wide variety of snakes. The first written reference to Borneo can be found in "Ptolemy’s Geography" (150 CE), even though the discovery of Roman trade beads suggests that an earlier foreign influence may have once existed. The sixteenth century brought worldwide interest in the island for trade purposes, especially from European nations eager to expand their empires. The Portuguese arrived first in 1521, followed by the Spanish, Dutch, and English, all of which established trade boundaries and protectorates.

From the game's History encyclopedia, AoE3: DE 100.19.18309.