were a handful of small conspiracies involving men with few followers and careless security; they were quickly suppressed. Techniques of repression included the suspension of Habeas Corpus in 1817 (allowing the government to arrest and hold suspects without cause or trial). Sidmouth's Gagging Acts of 1817 heavily muzzled the opposition newspapers; the reformers switched to pamphlets and sold 50,000 a week. In reaction to the Peterloo massacre of 1819, the Liverpool government passed the "Six Acts" in 1819. They prohibited drills and military exercises; facilitated warrants for the search for weapons; outlawed public meetings of more than 50 people, including meetings to organize petitions; put heavy penalties on blasphemous and seditious publications; imposing a fourpenny stamp act on many pamphlets to cut down the flow on news and criticism. Offenders could be harshly punished including exile in Australia. In practice the laws were designed to deter troublemakers and reassure conservatives; they were not often used. By the end of the 1820s, along with a general economic recovery, many of these repressive laws were repealed and in 1828 new legislation guaranteed the civil rights of religious dissenters. A weak ruler as regent (1811–1820) and king (1820–1830), George IV let his ministers take full charge of government affairs, playing a far lesser role than his father, George III. The principle now became established that the king accepts as prime minister the person who wins a majority in the House of Commons, whether the king personally favours him or not. His governments, with little help from the king, presided over victory in the Napoleonic Wars, negotiated the peace settlement, and attempted to deal with the social and economic malaise that followed. His brother William IV ruled 1830 to 1837, but was little involved in politics. His reign saw several reforms: the poor law was updated, child labour restricted, slavery abolished in nearly all the British Empire, and, most important, the Reform Act 1832 refashioned the British electoral system. There were no major wars until the Crimean War of 1853–1856. While Prussia, Austria, and Russia, as absolute monarchies, tried to suppress liberalism wherever it might occur, the British came to terms with new ideas. Britain intervened in Portugal in 1826 to defend a constitutional government there and recognising the independence of Spain's American colonies in 1824. British merchants and financiers, and later railway builders, played major roles in the economies of most Latin American