Some people know about Greek Bactria (north India) 2000 years ago. Also in the south at this time there were Greek traders.
".The development of overseas trade was made easy by the seaports situated on the coasts of the Tamil country.. . On the West coast, Musiri and Thondi were the two important seaports. Warehouses for storing the goods were built along the coasts. . Facilities were also made in the seaports for repairing the ships. The arrival and stay of foreign merchants in port towns were common during the Sangam period.( 400 BC - 200AD) . People from various countries had also lived in port towns and this paved the way for the development of cosmopolitan civic system in these towns.
Thus, throughout the Sangam period, the Tamil country had maintained commercial and other contacts with Greece and Rome. "
Recently in Bali Indonesia there were gold rings , ceramic plates and beads that were found by archaeologists and dated to 100 BC. The rings were of the same type as those found in Cambodia which had Kharoshti script , used by Greeks in Bactria . The plates were identified as south Indian. Together , the common factor of Greek trading populations indicate that Greeks were among the first to sail to Indonesia with definite proof from such objects. Greeks had become Buddhist and were largely responsible for taking the faith to Sri Lanka. Buddhism and Hinduism in Indonesia were then in part due to Greek traders settling there.
1200 years later it seems that Buddhism reached east Australia so maybe "Greeks" arrived before the British.
There is more detail........