[ModelBreaker]

There are still thousands of Civil War era shells buried, or sitting on the bottom off the coast. But a far more dangerous threat are unexploded munitions from more recent wars, especially the two World Wars.

This is not correct. The more modern munitions are much harder to set off. The civil war era explosives get more unstable as time goes by.

[U S Army EOD]

Not if it is Japanese. They used pitric acid which can be far more sensitive than black powder. Then you have the mustard gas rounds from WWI and you have WP which can leak, ignite, and set off the burster. Also, a fuze may still be functional.

If you feel you have one of these at home, bring it over in the light and we will take a look at it for you.