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In 1847 the Colombian government negotiated the building of a transcontinental railroad by investors in the United States, but political and health problems kept it from becoming operational until 1855. The Bidlack-Mallarino Treaty of 1846 had granted the United States a right-of-way through the isthmus and thus the right to intervene to protect the line and free transit across the continent. Political turmoil raged while construction was under way. Panama inaugurated and discarded 20 governors (also called presidents), while New Granada (now Colombia) elected, substituted, or deposed 7 in Bogotá.
The railroad helped the gold rushers destined for California, U.S., after 1848, but it also encouraged canal planners. Ultimately Colombia awarded the rights to build the canal to the French diplomat Ferdinand de Lesseps (who had been instrumental in building the Suez Canal in Egypt) and his Universal Interocean Canal Company; construction began in 1880. By 1889 disease, chicanery, and financial scandals in France and Bogotá ruined the corporation.
By 1892 Philippe Bunau-Varilla, a French former chief engineer of the canal works, had formed a new canal company, which acquired the assets of the defunct one. After considerable debate, the United States decided to build a canal through Panama rather than Nicaragua, and the U.S. Congress’s Spooner Act of 1902 authorized the U.S. president to buy the assets of the French company. Following up on this, Bunau-Varilla pressured Colombia to negotiate the Hay-Herrán Treaty of 1903, which would have allowed the United States to control a strip of land surrounding the projected canal. The Colombian senate, however, rejected the treaty.
Bunau-Varilla then turned to a group of Panamanian revolutionaries who were uniting in opposition to the Colombian government’s rejection of the canal treaty, its requisitions of property, and its impressment of Panamanian men during a civil war. On November 3, 1903, a revolutionary junta proclaimed Panamanian independence. Colombian forces were sent to crush the rebellion, but they were mired at Colón because the U.S.-administered railroad had strategically removed its trains from the northern terminus. U.S. naval forces also deterred reinforcements that were sent from Bogotá by land. The secessionist junta appointed Bunau-Varilla minister to Washington, D.C., with full powers to negotiate treaties. On November 18, 1903, he and U.S. Secretary of State John Hay signed the Hay–Bunau-Varilla Treaty. By this treaty the United States obtained, in perpetuity, the exclusive use, occupation, and control of the Canal Zone, a strip 10 miles (16 km) wide (5 miles on each side of the waterway). Formal acquisition of the lands took place on May 4, 1904. Construction of the canal resumed that summer, and it was opened on August 15, 1914.
The Republic of Panama
Early years
The new constitution authorized the United States to intervene militarily in Panama in order to quell disturbances. It also provided for a centralized government headed by a president who had the authority to appoint and dismiss provincial governors. Manuel Amador Guerrero became the first president, and universal suffrage was adopted in June 1907. As had been the case under Colombian government, traditional Liberal and Conservative parties dominated politics, but personalities and family ties proved more important than ideology in most contests. Political and economic unrest brought bloodless military interventions by the United States in 1908, 1912, 1918, and 1925.
In January 1931 the government of Florencio Harmodio Arosemena was overthrown in a bloody coup led by Arnulfo Arias Madrid, a charismatic populist unconnected to the traditional political elites. The United States acquiesced and promptly recognized as president the minister to Washington, Ricardo Alfaro, who presided over orderly elections in 1932, when Harmodio Arias Madrid (brother of Arnulfo) was the winner.
The new president persuaded the United States to relinquish its rights of intervention and of seizing lands for canal-related purposes, and the Hay–Bunau-Varilla Treaty was thus modified in 1936 by the Hull-Alfaro Treaty. In addition, the United States increased the annuity paid for the use of the Canal Zone and agreed to build a transisthmian highway. The Arias brothers soon fell out, however, and Arnulfo began his own quest for the presidency, which he won in June 1940. He then changed the constitution to extend the length of his term.