There are various versions of the causes leading up to the war between Chile, Peru and Bolivia, but the immediate cause of hostilities, which placed Chile in possession of the greatest nitrate fields in the world, was the cession by the Bolivian government to the Anglo-Peruvian firm of Gibbs & Company, of the right to work the nitrate deposits north of twenty-four degrees south, to construct a mole at Antofagasta and build a railway to some mines in the interior. Later this firm disposed of a portion of its concessions to a Chilean company, the “Compañia Salitres y Ferrocarril de Antofagasta.” When the Bolivian government discovered that Chilean capital and industry were developing the desert into a source of wealth, it laid an export bounty of ten cents per hundred weight upon manufactured nitrate of soda. The Compañia Salitres y Ferrocarril objected to paying export duties upon the products of its properties, and appealed to Chile for protection. Bolivia then threatened to seize all nitrate in the hands of exporters. The Chilean government protested against this arbitrary action and sent a fleet to blockade the ports of Antofagasta, Cobija and Tocopilla. On February 14, 1879, Chile took possession of Antofagasta and sent troops to the interior to protect the property interests of its citizens. General Hilarion Daza, President of Bolivia, then declared war, expelled some Chilenos from the country and confiscated their properties. Thus the fraternity and harmony of interests of the neighboring Republics were destroyed, the trumpets of war sounded, and the result was a change in the map of South America. Peru tendered her services as mediator and sent special envoys to Santiago and La Paz. But Chile,--having knowledge of a secret treaty celebrated between Bolivia and Peru in 1873, the purpose of which was declared to be the mutual guarantee of the independence, sovereignty and territorial integrity of the two republics, and mutual defense against aggression,--the proposition was looked upon by Chile with distrust. Peru proposed that Chilean troops should evacuate Antofagasta; that the three republics should guarantee a neutral administration of affairs. Chile demanded the annulment of the secret treaty of 1873, and that preparations for war on the part of Peru should cease. These propositions were rejected, and Chile declared war against the allies on April 5, 1879. Hostilities began at once and in earnest, both upon land and sea, continuing until Chile gained her final victories in the battles of Miraflores and Chorrillos, January 13, 1881, and four days later the victorious troops marched into Lima and occupied the Peruvian capital. The campaign was a succession of brilliant victories and achievements for the Chilean arms.