[A] wagon train [is a] caravan of wagons organized by settlers in the United States for emigration to the West during the late 18th and most of the 19th centuries. Composed of up to 100 Conestoga wagons (q.v.; sometimes called prairie schooners), wagon trains soon became the prevailing mode of long-distance overland transportation for both people and goods. Wagon-train transportation moved westward with the advancing frontier. The 19th century saw the development of such famous roads as the Santa Fe Trail, the Oregon Trail, the Smoky Hill Trail, and the Southern Overland Mail route. It was, however, in transit westward over the Oregon-California Trail that the wagon trains attained their most highly organized and institutionalized character. Meeting in early spring at a rendezvous town, perhaps near the Missouri River, the groups would form companies, elect officers, employ guides, and collect essential supplies while awaiting favorable weather, usually in May. Those riding in the wagons were directed and protected by a few on horseback. Continue reading from Britannica
It wasn't until 1836 that the first wagons were used on the trek from Missouri to Oregon. A missionary party headed by Marcus and Narcissa Whitman bravely set out to reach the Willamette Valley. Though the Whitmans were forced to abandon their wagons 200 miles short of Oregon, they proved that families could go west by wheeled travel.
In the spring of 1843, a wagon train of nearly 1,000 people organized at Independence, Missouri with plans to reach Oregon Country. Amidst an overwhelming chorus of naysayers who doubted their success, the so-called "Great Migration" made it safely to Oregon. Crucial to their success was the use of South Pass, a 12-mile wide valley that was virtually the sole place between the plains and Oregon where wagons could cross the formidable Rocky Mountains. Continue reading from the U.S. National Parks Service
Series: The Emigrant Experience (U.S. National Parks Service)
U.S. History: The American West (Khan Academy)
FAQs About Oregon Trail Wagons (U.S. Bureau of Land Management)
Oregon Trail (Oregon Encyclopedia)
History Bits and Westward Quotes on the Oregon Trail (U.S. Bureau of Land Management)
The Wagon (National Oregon / California Trail Center)