James Montogomery Flagg's was famous for one of the world's most recognizable images, the "I Want YOU " for the U.S. Army poster created during World War I. It was created to make citizens feel moral responsibility to recruiting to the army. The U.S government later used the same poster during World War II.
The poster he created of Uncle Sam motivated people to join the army. This use of propaganda was heavily relied on during the early-mid twentieth century, as they didnt have the media for spreading news far.
It would be the "joint occupation" policy that allowed people from both Britain and the United States to settle in Oregon country, since this was thought to be the most economically advantageous for the region.
