We had some TNT in the attic and a soviet mortar grenade in the outside storage when we bought our house. (Built in -25, remodeled in -45) Something to remember when cleaning up old houses.
(Around here itīs common to have grenades etc., cause soldiers coming from the front brought those back as souvenirs. )
Not likely in the states when they came back on boats.
But a lot of other scary/poisonous/dangerous stuff in old storages. Always take your time and wear respirator if needed.