these laws, which form the base of modern Hungary. April 18 – The Second Anglo-Sikh War breaks out in the Punjab. April 25 - Captain Francis Crozier and Commander James Fitzjames of the Royal Navy deposit the final record ever recovered from the Franklin Expedition in a cairn on King William Island, after deserting their ships, HMS Erebus and HMS Terror, with their surviving 105 crew members on April 22, to march to the mainland of North America. April 27 – The second abolition of slavery in France and its colonies initiated by Victor Schœlcher. April 29 – Pope Pius IX publishes an allocution announcing his refusal to support Piedmont-Sardinia in its war with Austria, and dispelling hopes that he might serve as ruler of a pan-Italian republic. The allocution, by which Pius is seen to withdraw his moral support for the Italian unification movement, is a key first step in the soon-to-be crushing reaction against the revolutions of 1848. May 15 Radicals invade the French Chamber of Deputies. 40,000 Romanians meet at Câmpia Libertății in Blaj, to protest Transylvania becoming a part of Hungary. May 18 – The first German National Assembly (Nationalversammlung) opens in Frankfurt, Germany. May 19 – The Treaty of Guadalupe Hidalgo, ending the Mexican–American War, is ratified by the Mexican government (cf. February 2, above). May 29 – Wisconsin is admitted as the 30th U.S. state. May 30 – The Prudential Mutual Assurance Investment and Loan Association is established at Hatton Garden in London (England) to provide loans to professional and working people, origin of the multinational life insurance and financial services group. June – The Serbians from Vojvodina start a rebellion against the Hungarian government. June 2 – 12 – The Prague Slavic Congress brings together members of the Pan-Slavism movement. June 17 – The Austrian army bombards Prague, and crushes a working-class revolt. June 21 – Wallachian Revolution of 1848: The Proclamation of Islaz is made public, and a Romanian revolutionary government led by Ion Heliade Rădulescu and Christian Tell is created. June 22 – The French government dissolves the national workshops in Paris, giving the workers the choice of joining the army or going to workshops in the provinces. The following day, the June Days Uprising begins in response. July–September July – The Public Health Act establishes Boards of Health across England and Wales, the nation's first public health law, giving cities