8 July 1832, disembarks a force of 7500 men near Mindelo, from where they advance to the nearby city of Oporto, taking it on the next day. The Liberal army becomes them under siege inside Oporto by the Miguelite army that concentrates around the city. A dead-lock occurs then during an entire year, with neither the Miguelite forces being able to take the city neither the Liberal ones being able to break the siege. To break the impasse, the Liberals then decide to open another front in the rearguard of the enemy forces. A naval fleet sails from Oporto on 20 June 1833—with half of the Liberal army on board—and disembarks it in the Algarve. On the return voyage, the Liberal fleet under the command of Charles Napier encounters and defeats the Miguelite fleet under the command of Manuel António Marreiros in the Battle of Cape St. Vincent on 5 July 1833. The Civil War finally ended on 24 May 1834, when Michael I signed the Concession of Evoramonte, renouncing all claims to the Portuguese throne. The long period of conflict that goes from the Napoleonic Wars to the end of the Civil War weakened the country and caused a sharp decline of its Navy. This decline was further reinforced due to the mutual mistrust between the Liberal politicians and the Navy due their past in the Civil War, symbolized by the disagreement between Queen Mary II and the Navy that will cause that, during the whole Constitutional Monarchy, this will never receive regimental colors, with its landed forces always parading carrying a simple guidon. This mistrust resulted in a lack of priority given by the Government towards the navy, with a neglecting in the investment in the naval forces for many years. In this period, the Portuguese Navy lost most of its capacity as a global blue-water navy, becoming a small naval force limited of having merely the capacity to patrol of the littoral zone of Portugal and do the naval policing of the Portuguese colonies. Late 19th century to World War I In the 1830s, the Portuguese Navy incorporated its first steamships. The last Portuguese ship of the line, the 80-gun Vasco da Gama, was built in Lisbon in 1841 and the last sailing frigate, the 60-gun Dom Fernando II e Glória, was built in Daman (Portuguese India) in 1845. From the late 1850s, the navy gradually replaced