Defense! Long Island women : Home defense day (1941) poster by Federal Art Project. Original public domain image from the… https://www.rawpixel.com/image/8639206/image-art-vintage-public-domainFree Image from public domain licenseConfidence woman, vintage character illustration. Remixed by rawpixel. https://www.rawpixel.com/image/8826571/image-art-vintage-illustration-blueView licenseUS flag, patriotic illustration. Remixed by rawpixel. https://www.rawpixel.com/image/8826845/image-art-vintage-illustration-blueView licenseBattlefield cannon illustration vector https://www.rawpixel.com/image/573113/german-battlefield-cannonView licenseCannon from Germany and France: a popular history of the Franco-German War (1884) published by Elihu Rich. Original from the… https://www.rawpixel.com/image/571661/german-battlefield-cannonFree Image from public domain license