caption: The image shows a poster with a picture of a person holding a gun and the text "The Thin Khaki Line Keeps the Fate of Belgium from Your Hearth and Home - Get Into Khaki Now" written in bold, black lettering. The person in the picture is wearing a military uniform and has a determined expression on their face, as if they are ready to take on any challenge. The background of the poster is a deep blue, with a few stars twinkling in the night sky.