Also, a sword doesn't require any special conditions to operate. A flintlock (probably more properly, for your purposes, a miquelet or snaphaunce) requires a certain oxygen content of the atmosphere, a certain maximum moisture content, etc., etc. A sword just needs... a hand with a decent arm attached.
"You fought with Captain Reynolds in the war?"
"I fought with a lot of people in the war."
"And your husband?"
"I fight with him sometimes, too."