The First Geneva Convention for the Amelioration of the Condition of the Wounded in Armies in the Field, held in 1864, is the first of four treaties of the Geneva Conventions. It defines "the basis on which rest the rules of international law for the protection of the victims of armed conflicts." After the first treaty was adopted in 1864, it was significantly revised and replaced by the Second Geneva Convention in 1906, followed by the Third Geneva Convention in 1929, and finally the Fourth Geneva Convention in 1949. It is inextricably linked to the International Committee of the Red Cross, which is both the instigator for the inception and enforcer of the articles in these conventions.
The 1864 Geneva Convention was instituted at a critical period in European political and military history. Elsewhere, the American Civil War had been raging since 1861 (starting with the Battle of Fort Sumter), and would ultimately claim between 750,000–900,000 lives. Between the fall of the first Napoleon at the Battle of Waterloo in 1815 and the rise of his nephew in the Italian campaign of 1859, the powers had maintained peace in western Europe. Yet, with the 1853–1856 conflict in the Crimea, war had returned to Europe, and while those troubles were "in a distant and inaccessible region" northern Italy was "so accessible from all parts of western Europe that it instantly filled with curious observers;" while the bloodshed was not excessive the sight of it was unfamiliar and shocking. Despite its intent of ameliorating the ravages of war, the inception of the 1864 Geneva Convention inaugurated "a renewal of military activity on a large scale, to which the people of western Europe…had not been accustomed since the first Napoleon had been eliminated."
The movement for an international set of laws governing the treatment and care for the wounded and prisoners of war began when relief activist Henri Dunant witnessed the Battle of Solferino in 1859, fought between French-Piedmontese and Austrian armies in Northern Italy. The subsequent suffering of 40,000 wounded soldiers left on the field due to lack of facilities, personnel, and truces to give them medical aid moved Dunant into action. Upon return to Geneva, Dunant published his account Un Souvenir de Solferino and, through his membership in the Geneva Society for Public Welfare, he urged the calling together of an international conference and soon helped found the International Committee of the Red Cross in 1863.