Pavel and the Tree Army by Heidi Smith Hyde, illustrated by Elisa Vavouri, is set in the Depression when President Roosevelt established the Civilian Conservation Corps (CCC). The CCC provided jobs for thousands of poor young men, many of them recent immigrants. It was a huge success--more than three billion trees were planted by people like Pavel. It was a path to becoming Americanized as well. Did you know the Star Bangled Banner only became our national anthem in 1931?