OTOH, there are also stories of US Civil War-era shells still being dug up, or acquired at garage sales that explode when placed near an active fireplace.
Shells from WW1 are still being unearthed in the fields of France and Belgium to this day...and once in a while they still explode.
Several years ago a (live) 3 inch shell from WW1 was unearthed in a backyard close to the Great Lakes naval base. Not sure if they ever figured out how it got there.