Volcanic activity in the region has been traced to 40 million years ago, in the Eocene era, forming much of the region's landscape. In the Pleistocene era (the last ice age, two million … See more

Great Britain and the U.S. both claimed ownership of Oregon, ignoring any claims by indigenous peoples to their territories. The dispute, friendly … See more

At the outbreak of the American Civil War, regular U.S. troops were withdrawn and sent east. Volunteer cavalry and infantry were recruited in … See more

Both the Oregon Territory and the State of Oregon have had multiple laws and policies discriminating against racial minorities. An 1844 … See more

Paleo-Indians
Although there is considerable evidence that Paleo-Indians lived in the Pacific Northwest 15,000 … See more

The perception of Oregon by early European explorers and settlers varied according to the purpose and method of exploration. Official explorers came, at first, primarily by … See more

The Astor Expedition of 1810–1812, financed by American businessman John Jacob Astor, brought fur traders to the future site of Astoria by both land and sea. Fort Astoria was … See more