ImageID: IX004815 / Christie's Images / CORBIS / by John Gast /
product tags: american progress, by john gast, 1 and group, adults, agricultural field, agricultural worker, allegorical, allegorical figure, american, period or style, american west, americans, animal, cropland, cultivating, even toed ungulates, exploration, farm equipment, farm machinery, farmer, farming, females, fine, flying, grassland, growth, hill, historical theme, holding, horse, john gast, locomotive, males, mammal, manifest destiny, men, migrating, motion, posters,