As the USA is limited to a single coast, the Yanks do not dedicate as much effort in building a blue water navy. With the presence of other American colonies the mass migrations are diverted to some extent to these other colonies. Without the prospect of westward expansion and the addition of new slave states to the USA, the sale value of slaves begins to drop. As the eastern slave states begin play out their soil and with a reducing return on investments in slave stocks, the agricultural models which had worked well during expansion now greatly burden slave owners. This divides opinion in the southern states as to the path the nation should take. This results in the formation of new political parties and splitting the "solid south"'s vote. One party promotes a imperial USA, seizing colonies abroad in the model of European nations. This would lead to the rather ironic event of shipping slaves from the USA to Africa to work the fields. Another party promotes the idea of slave industrial labor.		But few industrialist were interested in being burdened with the long term commitment needed to maintain a slave population. The impracticality of these approaches and the spilt in the slave vote results to a gradual emancipation of the slaves. Once Virginia passes a general emancipation, the other slave states soon follow suit. With the invitation of Russia into the Northwest as part of the treaty ending the war of 1812, the USA seemed quite silly in declaring the Monroe Doctrine. With the Yanks found themselves much too concerned with the wars with the Indians and the threat from Canada to do more the bluster about this initiative. Especially after the reoccupation of New Spain by the Spanish, the European powers felt free to press their claims for territory in the new world. In less then 30 years most of the independence movements across South America have been reversed or subverted resulting in reoccupation of most of the continent.