<Li> United States involvement in regime change </Li> <Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> In the 19th century, manifest destiny was a widely held belief in the United States that its settlers were destined to expand across North America . There are three basic themes to manifest destiny: </P>

When did the westward expansion begin and end