Before Japan surrendered to end WW2, the US armed forces ordered 1.5 million Purple Heart medals in anticipation of a difficult land invasion. Roughly 500,000 were left after WW2, and that stock, although refurbished, is still likely being used today. – WTF Fun Facts
Source: https://www.warhistoryonline.com/instant-articles/purple-heart-stockpile-wwii-medal.html