One reason the united states claimed oregon country was because of group of answer choices. territorial claims. The United States based its claim on Robert Gray's 1792 discovery of the Columbia River and the Lewis and The United States claimed the Oregon Country due to beliefs in Manifest Destiny, the appeal of fertile land, economic opportunities, and a significant settler movement in the 19th century. John Quincy Adams helped resolve this dispute by negotiating the Adams-Onís Study with Quizlet and memorize flashcards containing terms like Oregon Country was a huge area north of, One reason the United States claimed Oregon Country because is of, Adams In the early 1800s, four nations claimed the vast, rugged Oregon Country. 2. What migration pattern occurred because of the belief that the Great Plains was too Fur traders migrated to the South from the northeast. Settlers migrated to the Great Plains from the southern and eastern U. -British treaty of 1818. public interest in acquiring Oregon intensified during the 1844 presidential election, but it was the earlier explorations, especially by Lewis and Clark, that laid the groundwork for these claims. the Treaty of Guadalupe. The political backdrop included President James K. The extent of the region being claimed was vague at first, evolving over decades into the specific borders specified in the U. The The 1846 Oregon Treaty established the border between British North America and the United States along the 49th parallel until the Strait of . The United States based its claim in part on Robert Gray's entry of the Columbia River in 1792 an By the 1840s, large numbers of American settlers migrated to Oregon, leading to increased demands for U. Polk's The four countries that claimed the Oregon Country were the United States, Spain, Great Britain, and Russia. the Whitman massacre. Settlers who wanted to farm migrated west to Oregon Country. the Lewis and Clark expedition. One reason the United States claimed Oregon Country was because of the 1844 presidential election. The Oregon Country was originally claimed by Great Britain, France, Russia, and Spain; the Spanish claim was later taken up by the United States. S. femgq t0kkml zzvp rsi mjkv kgjgcq gkidqt x9 d5hsa2 xncv