Avenue of the Allies: Brazil, Belgium by Childe Hassam is part of the artist's famous series of flag paintings, created during World War I. This painting showcases vibrant flags of Brazil and Belgium fluttering along a bustling city street, symbolizing solidarity between nations. Hassam’s use of impressionistic brushstrokes and bright, patriotic colors creates a dynamic and uplifting image, capturing the energy and hope of the wartime period.