The US Sprite Pack for Hearts of Iron III is cosmetic DLC pack that includes new unit models for ships, fighters, bombers, and tanks that show up on the game's world map and add more diversity to the unit looks for the North American military forces. I'm not sure why the screenshots are showing infantry pictures here but if you look the pack up on Steam you can see the correct pictures of the models that are introduced with this. The price is reasonable for the number of units, which are all quite varied and modeled after historic ships and tanks of the time period, and it is a good purchase if you are looking for more unit diversity and if you are not a person that prefers to play with unit counters instead of using the unit models.