Analyze the Transcontinental Railroad (1863–1869) with 4-thread causation chain — federal land grants, Chinese labor, Indigenous displacement, environmental modification
Exercise Difficulty 3 ~6 min hist.g4.s.ex_30

Route Labor Overlay

MG-12 Map
Transcontinental Railroad Route Map — May 1869 completion route from Sacramento CA east via Sierra Nevada (Central Pacif

Transcontinental Railroad Route Map — May 1869 completion route from Sacramento CA east via Sierra Nevada (Central Pacific) to Promontory Summit UT, then east via Wyoming/Nebraska to Omaha NE (Union Pacific). Mile-by-mile labor identification: Central Pacific labor identified as ~15,000 Chinese laborers (approximately 90% of CP workforce) + Irish, German, formerly enslaved African American workers; Union Pacific labor identified as primarily Irish American + formerly enslaved African American + Civil War veteran workforce. Indigenous nations displaced by the railroad route shown in translucent overlay: Paiute, Shoshone, Goshute, Bannock, Ute, Lakota, Cheyenne, Arapaho, Pawnee — ALL sovereign nations TODAY. The 'Andrew J. Russell East Meets West' photograph location at Promontory Summit marked, with annotation 'No Chinese laborer is in this famous photograph despite their majority labor — naming this absence is part of learning.' Style: cartographic with explicit labor-and-displacement legend.

Prompt

On MG-12, trace Central Pacific route Sacramento → Promontory + Union Pacific route Omaha → Promontory. Identify labor source for each.

How it's presented
mode map interaction prompt audio ID audio.g4s.ex 30.stem
Answer criteria
type route and labor
correct
both routes traced + Central Pacific = Chinese, Union Pacific = Irish + African American + Civil War veterans
Hints
  1. MG-12 has labor overlay
  2. Promontory Summit is in Utah
Misconceptions to watch
  • Switching CP and UP labor
  • Missing Promontory location