The correct answer to this open question is the following.
Unfortunately, you forgot to attach the painting. Without the painting, we cannot see the content of the artwork.
However, trying to help you we did some deep research and can comment on the following.
The message the painting "Manifests Destiny" communicates to the viewer is that the United States had the right to expand and settled different territories from the East Coast to the West Coast and beyond.
That is why in the picture of 1872, the author John Gast, depicted a tall "lady" angel in white pristine clothes accompanying American people ready to explore new frontiers.
Although the specific term "Manifested Destiny" was coined until 1845, it was used as a was y to allow the expansion of white American settlers into territories that belonged to the Native American Indian tribes. This expansionist idea dominated the 1900s and under the idea that God blessed the "white" United States to expand and settle new territories, forced the Indians to leave their lands, and the federal government created legislation that supported the settling of the whites.
