2. What event, which began in 1848, led to an increased need for rapid transcontinental mail delivery?
From Quiz The Fastest Mail in the West
Answer:
California gold rush
The discovery of gold at Sutter's Mill in January of 1848 led to a dramatic influx of people. By 1860, the population of California had gone from around 75,000 residents to nearly 400,000. California became a state in 1850, and effective statehood required faster communication than was then available. Ships from California had to travel all the way down to the southern tip of South America, around Cape Horn, and back up through the Atlantic. Overland travel, even by dedicated coaches, took the best part of a month to get from one side of the country to the other. The imminence of the American Civil War, and the consequent unsettled political atmosphere, also increased the urgency of establishing an efficient communication system.