Such ships played a major role in commerce in the sixteenth and seventeenth centuries and were often drafted into use as auxiliary naval war vessels—indeed, they were the mainstay of contending fleets through most of the 150 years of the Age of Exploration—before the Anglo-Dutch wars made purpose-built warships dominant at sea during the remainder of the Age of Sail.
^[1] Galeão – Navegações Portuguesas by Francisco Contente Domingues (in Portuguese)
^Despite this kind of ship (or only a close model of art) was already depicted in the heraldry of the Foral of Lisbon (of D. Manuel I) in 1502, it is in 1510 (as also in some of the following years after 1510) the appearance of the Portuguese oceanic galleon in the records. It is however from 1519 that their number increases substantially, but gradually. It was an evolution and a gradual improvement in the design made during the first quarter of the century – technical improvement which continued until the second half of the century. The Portuguese galleon evolved from the square rigged caravel and was a compromise between the great carrack or nau and the aforementioned square rigged caravel or war caravel (also called caravela de armada or Portuguese man of war) that evolved into a new design of ship, but keeping its hull design similar to the galley.[1] It was also more maneuverable, more robust and heavily armed.