In December of 1948, American media outlets reported that Defense Secretary Forrestal had announced that the US wanted a space station for military purposes. The US had, in fact, been working on space for military applications since the end of World War II with both the US Navy and US Air Force studying space launch systems as early as 1944. However, the 1948 space station was most likely just a talking point, something that the Pentagon would *like* to have for any of a number of military purposes. So far as I’m aware, no actual designs produced by relevant government or corporate design bureaus have come to light. Still, the lack of anything firm to base an artists impression on didn’t slow down the media; a number of newspaper and magazine artists impressions were produced. Many of them, such as the one below (from the December 31, 1948, Washington Daily News, via an EBay auction), demonstrate a substantial lack of understanding of, well, *everything*. They tended to be a weird mishmash of Flash Gordon sci-fantasy with the V-2 and similar exotic and half-comprehended technologies.
Note that this cartoonish “space station” seems to have it all… radar, giant cannon barrels and a square mirror to reflect sunlight to set the enemy alight. This, of course, would not work.