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Maroantsetra, formerly Louisbourg, is a market town and domestic seaport in Analanjirofo Region, Madagascar, at the northern end of the Bay of Antongil. In 2018, Maroantsetra counted 42,529 people. Even though it is a small city, Maroantsetra played an important role in the betsimisaraka history as the unification of this tribe by Ratsimilaho started there. Throughout the eighteenth century, Maroantsetra also actively participated in the piracy and the attack led collectively by the betsimisarakas against the islands of comoros and some east african countries.