Decals for unit and platoon identification markings for US tanks and vehicles. These usually go on the bumper along with these bumper unit IDs decal sheets. These are the same height as well so they should match on your vehicles. For vehicles with smaller bumpers like jeeps and half tracks, going down 1 scale (e.g., 28mm to 20mm) may be best for it to fit on extremely thin bumpers depending on the model creator.
You can find more about what these mean here: https://www.lonesentry.com/panzer/jeep-markings.html
Majority of the knowledge used to create these markings were found in the amazing book: https://www.amazon.com/gp/product/B07S83H8R6
