I remember when the US invaded Grenada in 1983. A college friend of mine received some bloody insignia from the uniform of a dead Cuban his brother had killed.
A couple months after Grenada (I was in my teens at the time) somebody found an AK-47 in a pond about 20 miles from my home in PA. Local and state police (and maybe the ATF) started investigating and tracked it down. Apparently one of the young Rangers who had jumped into Grenada had smuggled it back as a war trophy, then got nervous when he realized it might be a problem and ditched it.