What You Need to Know First
The Hay-Bunau-Varilla Treaty of November 18, 1903 gave the United States “in perpetuity the use, occupation and control” of a 10-mile-wide Canal Zone, and the U.S. State Department’s milestone history confirms the same provisions and Panama’s independence guarantee.[1] By that time the isthmus was already cut by the 47-mile Panama Rail Road that opened in 1855.[2] That railroad had grown out of the 1849 California Gold Rush: after twenty months of construction only “seven precarious miles of track had been laid” before funds ran out, and the gold-rush traffic that arrived in 1852–1855 saved the company financially. The final spike was driven at midnight on January 27, 1855, and the next day “the world’s first transcontinental train ran from ocean to ocean.”[2]
The Colonial and Pre-Columbian Eras
Before the Spanish arrived, the isthmus was home to indigenous chiefdoms known for goldwork: Sitio Conte is the most studied site, with elaborate gold and ceramic grave goods now held in Panamanian, North American, and European museums.[4] The Spanish colonial economy depended on the Camino Real, a mule trail that crossed the isthmus between Caribbean ports (Nombre de Dios / Portobelo) and Panama City on the Pacific, ferrying Peruvian silver and other goods across to waiting galleons. The Portobelo trading fairs ran almost continuously from the late 1500s until the mid-eighteenth century; the fortifications at Portobelo-San Lorenzo (still standing today) were the colonial lynchpin of that trade.[5]
The 19th Century: Railroads, Gold, and the Failed French Attempt
The California Gold Rush created Panama’s first modern transit infrastructure. William Henry Aspinwall, who had promoted the Panama Rail Road as a co-founder of both the Pacific Mail Steamship Company and the Panama Canal Railway companies, broke ground in May 1850; the company’s town of Manzanillo was incorporated on February 2, 1852 and renamed Aspinwall, the name that still sticks to the Colón side of the track.[7][2] The railroad cost $8 million and was built by more than seven thousand workers drawn from “every quarter of the globe” under conditions of “tropical rain forest terrain and outbreak of malaria and cholera.”[7] A French effort under Ferdinand de Lesseps, the same engineer who had built Suez, began digging a sea-level canal in 1881 and went bankrupt in 1889; the project cost an estimated 22,000 French workers’ lives from malaria and yellow fever before the assets passed to the United States.[3]
The U.S. Era and the Modern Republic
The U.S. canal era began on May 4, 1904, when Lieutenant Mark Brooke of the United States Army was presented with the keys to the French canal property in a small ceremony, and the first official transit opened on August 15, 1914 with the transit of the SS Ancon.[6] The Canal Zone remained a U.S.-administered enclave for the next 75 years; the 1977 Carter-Torrijos Treaties set the canal’s transfer to Panama on December 31, 1999. The 1989 U.S. invasion of Panama, Operation Just Cause, lasted five weeks, from December 20, 1989 to January 31, 1990, and was triggered by General Manuel Noriega’s indictment on drug-trafficking, racketeering, and money-laundering charges out of Miami; the canal continued to operate throughout the operation, and turnover to Panamanian control proceeded on schedule on December 31, 1999.[8]