The term Spanish Warship can be summarized as a large sailing ship from the 16th to 18th centuries, typically with three or more masts and square rigging. The most common type of Spanish warship was the GALLEON, which was a large, multi-decked sailing vessel with a high sterncastle and at least three masts. Galleons were used by the Spanish Empire for trade, exploration, and warfare during the 16th to 18th centuries.