He left Goa, Portuguese India, on 9 January 1587 as captain of one of the ships in an expedition led by Martim Affonso de Mello.
The main purpose was punitive, in response to aggression by the Turks on the East coast of Africa.
[5] An engraved stone in Fort Mirani reads (in Portuguese), Under the reign of the very high and mighty Felippe, first of this name our Lord and King, in the eighth year of his reign in the Crown of Portugal, he sent by Dom Duarte de Meneses, his Viceroy and Governor of India, that this Fortress be made, which was done by Belchior Calaça, its first captain and founder, 1588.
[6] In May 1588 a party of Jesuit missionaries led by Pedro Páez arrived at Muscat, where Calaça was in command, en route to Ethiopia.
[8] Around 1598 Calaça was involved in an unsuccessful attack on Cuneale in the peninsula of Pudepatam, 77 leagues from Goa and 35 from Cochin, on the Malabar Coast of India.