This striking Paraguayan stamp, issued in the 1930s, features a bold red map design asserting Paraguay’s claim over the Chaco Boreal region. The inscription “Ha sido, es y será del Paraguay” (“It has been, is, and will be Paraguay’s”) strongly proclaims national sovereignty during the Chaco War period with Bolivia (1932–1935). The central map shows Paraguay and its contested borders with Bolivia, Brazil, and Argentina. Denominated 150 Pesos, this issue is a historically significant piece symbolizing both patriotism and conflict in South America’s early 20th-century geopolitical struggles. A must-have for collectors of South American history and wartime propaganda stamps.