warships stayed in the drydocks, although a number of ships managed to follow the fleeing stadtholder William V to Great Britain; others, like the ships sailing in East Asia, were later joined with the forces of William V. After the surrender of a naval squadron at Saldanha Bay (1796) and the defeat at the Battle of Camperdown (1797), the surrender of the fleet near the Vlieter in 1799 proved to be the death of the Batavian Navy. In the three years (from 1810) the Netherlands were a part of Imperial France the navy was integrated with the French navy. Revival The Netherlands regained their independence and on December 7, 1813, the Dutch navy was once again a part of the Dutch armed forces. The Dutch navy in the 19th century suffered from a constant shortage of manpower, forcing the government to hire crew from its colonies; this increased the total employees from 5000 in 1850 to over 10,000 in 1900. After the bankruptcy of the East India Company Dutch naval tasks shifted greatly towards East Asia, until some 60% of the entire navy was situated there around 1850. Alongside the Colonial Navy, administrative and civil tasks were carried out by the Government Navy. 1850s till World War II After the disappearance of the ship of the line a whole array of ship classes and types were created. The invention of the propeller launched the mass use of steam-propelled ships. The first steam-powered frigate Admiraal van Wassenaar entered service in 1857. With the introduction of Ironclad warship in the early part of the second half of the 19th century the navy began to modernize the fleet with a series of monitors and two larger turret ram ships, and . The first of these ships were purchased from foreign shipyards. But in 1867 the Rijkswerf in Amsterdam was the first to be modernized to build armored warships. In the 1890s the navy again modernized with the construction of a series of protected cruisers and coastal defence ships. Since the country had become a kingdom, the Dutch navy was renamed the Royal Netherlands Navy in 1905. The 1910s saw the introduction of the first submarines. Just before World War I the navy had plans to acquire several dreadnought battleships but the war prevented these from ever being built. In 1917, the first airplanes were added to the navy. After the war the navy