musketeers, one third of swordsmen and the final third of pikemen): . . . . Of the Tercios above, the first is considered the core of the Spanish Marine Infantry, and it bears in its coat of arms two crossed anchors that became the Corps' coat of arms until 1931. In 1704, the Tercios became regiments: Regimiento de Bajeles (Vessel's Regiments), Regimiento de la Armada (Navy Regiment), R. del Mar de Nápoles (Naples' Sea Regiment), and R. de Marina de Sicilia (Sicily's Navy Regiment), detaching some small units to the Army, and the main body remained in the Navy becoming the Cuerpo de Batallones de Marina (Navy Battalions Corps). The battles that the marines served in during this very busy period included: Algiers expedition (1541). Battle of Lepanto (1571). Tunisia expedition (1573). The conquest of Terceira Island (Azores) (1582). Great Britain expedition (1599). San Salvador (Brazil) expedition (1625). Second period In 1717 the Cuerpo de Batallones de Marina was definitively settled and organized into a 12-battalion corps with a corresponding regimental HQ overseeing the supervision of these units. The first ones were named: Armada, Bajeles, Marina, Oceano, Mediterráneo and Barlovento. Their mission was to form the "Main body of landing columns and ship's soldiers tasks" in a time that boarding was still a critical part of battle at sea. They were also gun crews. In 1728 the battalion Mediterráneo and in 1731 the battalion Barlovento were disbanded. In 1741 there were eight battalions and ten years later another was added. In 1740 a marine artillery corps was founded. At mid 18th century there were 12,000 marine infantry and 3,000 marine gunners. The infantry formed boarding parties while the gunners manned the ship cannons. As needed landing parties were formed. Both corps also garrisoned the navy's coastal fortresses. During the War of Spanish Independence both the marine infantry and the marine artillery was reorganized as an administrative division of seven regiments, mainly fighting on land as part of army divisions in an operational role. In a 1793, a woman, Ana Maria de Soto, disguised as a man, and answering to the name of Antonio Maria de Soto, enlisted in the 6th company of 11° Battalion of the Navy, being licensed with pension and honors in 1798, when she was discovered to be a woman. The major actions they took part in during this period were: Sardinia, 1717 Naples and Sicily, 1732