1845 | Asia - India
| Anglo Sikh War |
1846 | North America
 Unidentified photographer, 1846 (ca), Exeter, N.H. [Exeter, New Hampshire, volunteers leaving for the Mexican War], [Mexican-American War], Daguerreotype, 1/4 plate, Amon Carter Museum, LL/38724 | Mexican War - it ends with the Treaty of Guadalupe Hidalgo (1848). The surviving daguerreotypes are among the earliest taken of a war. |
1848 | Asia - India
| Anglo Sikh War |
1848 | Europe
 Charles-François Thibault, 1848, 26 June, The Barricade in rue Saint-Maur-Popincourt after the attack by General Lamoricière's troops, Daguerreotype, Source requested, LL/6255 | Known as the Year of Revolutions in Europe with the Chartist uprising in London and the establishment of the Second Republic in France with bloody riots. |
1848 | Global
| Communist Manifesto published |
1854 | Asia
 Roger Fenton, 1855, Valley of the Shadow of Death, Salt print, J. Paul Getty Museum, LL/7333 | Crimean War |
1856 | Asia - China
 Felice Beato, 1860, Sir James Hope Grant, Albumen print, National Galleries of Scotland, LL/6823 | Second Chinese Opium War |
1857 | Asia - India
 Felice Beato, 1858 (ca), The Residency, Taken in Front, and Showing the Room in Which Sir Henry Lawrence was Killed, Lucknow., Albumen silver print, Brown University Library, Special Collections, LL/6833 | The Indian Mutiny |
1858 | North America - Mexico
| Civil War starts in Mexico and Benito Juárez (1806-1872) is elected president. |
1859 | Europe
| The Austro-Sardinian War is fought between the French under Napoleon III and the Kingdom of Sardinia under Victor Emmanuel II on the one side and the Austro-Hungarian Empire on the other. The campaigns and battles (Montebello 20 May, Palestro 30 May, Magenta 4 June and Solferino 21 June) are photographed by Luigi Sacchi and Béraldy amongst others. |