The Purple Hearts that have been awarded since the end of WWII were all made during WWII. The expected invasion of Japan was thought to be so bloody that half a million PHs were made, and luckily not all needed then. The war ended because of the atomic bombs, aided by ongoing issues the Japanese government had with maintaining the war. Japan was not going to give it up easy and the number of army divisions in southern Japan were proof of that, along with the arming the citizens with all sorts of things to resist the expected US forces.
Freedom Isn't Free.