Conversation so far:
uncle sam is a symbol of which country
Uncle Sam is a common national personification of the U.S. federal government or the country in general
Who is Uncle Sam based on
Uncle Sam is based on Samuel Wilson. He owned a meat packing business in Troy, NY. During the War of 1812, he supplied food for the American soldiers
Who was the first person to draw the personification of Uncle Sam
Thomas Nast was the first to popularize the image of Uncle Sam, from 1860 through 1870. Nast gave him a white beard and a Stars and Stripes suit.
Which illustration is the standard personification of Uncle Sam
James Montgomery Flagg’s illustration is now the standard for Uncle Sam

Question: Whose face is on the illustrator's personification
Self-contained rewrite: Whose face is on James Montgomery Flagg's illustration of Uncle Sam