I think it is two ocean plates colliding each other forming small islands
it form from a volcano in 1919
Indonesian Archipelago
The Malay Archipelago (or Indonesian Archipelago) is often referred to as the largest archipelago in the world.
The Indonesian archipelago
An archipelago is a group of islands clustered together in a specific area, such as the Indonesian Archipelago or the Philippine Archipelago.
java is an island on the Indonesian archipelago. it is a part of Indonesia.
Mount Tambora is in the Indonesian archipelago.
did you mean Archipelago? an Archipelago is a chain or cluster of islands that is formed tectonically
the states were Christians.
malay peninsula and the indonesian archipelago
these states did not have strong, central monarchies
i think its these states had fewer goods to trade.
The largest Islands in Indonesia are: Borneo, Java, Sumatra and Sulawesi