ChronoFive
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Setting the scene
By 1860s, traveling coast-to-coast took 6 months by wagon or 3 weeks by sea around South America. The Pacific Railway Act of 1862 authorized a transcontinental line during the Civil War to bind California to the Union. The Union Pacific built west from Omaha using Irish immigrants and Civil War veterans, while Central Pacific built east from Sacramento using 12,000 Chinese workers.
What happened
Construction was brutal—workers blasted tunnels through Sierra Nevada granite, endured avalanches, and faced Native American resistance on the Plains. The two lines met at Promontory Summit, Utah, on May 10, 1869. Leland Stanford drove the golden spike connecting the rails, and telegraph wires flashed 'DONE' nationwide. The 1,912-mile line was built in 6 years.
Why it still matters
The railroad cut cross-country travel from months to 7 days and cost from $1,000 to $65. It enabled westward settlement, destroyed the bison and Plains Indian way of life, and created a national market. The railroad made Chicago, Omaha, and San Francisco boomtowns. It also involved massive corruption—Crédit Mobilier scandal. The transcontinental railroad unified America geographically and economically, making the US a continental power and foreshadowing its global dominance.
Background
The ceremonial 'Golden Spike' marked the linkup.