British-American relations during the 1840?s had a couple of disputes that could have cause war with Britain. The main things the British and Americans disagreed over in the 18 40?s were borders and ownership of territory. Because of the Manifest Destiny mentality of the Americans they thought that all territory to the west belonged to or would belong to the US. The main territory in dispute was the Oregon territory, which could have went a lot worse and could have started a war with Britain. The Caroline affair also could have led to war because the US could have taken it as an invasion onto US soil from Canada, which was British controlled. The Creole case also caused tension. Even though these tension causing events were occurring Britain and America were progressing towards more defined borders. An improvement in relations was also shown in the repeal of the Navigation acts.
The July 1845 edition of New York?s Democratic Review contained an editorial by John L. Sullivan. Written specifically to support the U.S. annexation of Texas, O?Sullivan?s article introduced a phrase that was excitedly adopted by supporters of Western expansion as the Manifest Destiny.
?It is our manifest destiny to overspread the continent allotted by providence for the free development of our yearly multiplying millions.? Said O?Sullivan.
As the nation approached the middle of the nineteenth century, enthusiasm for territorial expansion ran high. Supporters of the Manifest Destiny argued that more Western land was needed to provide space for the new Americans created by a high birth rate and increased immigration. They pointed out that land governed by Mexico and Britain was sparsely populated and mostly unproductive. The supporters argued that the land should be given to American settlers who can put it to better use.
The Democrats were the most...