Related to the tank story, two seperate quotes by Arneson suggest something very interesting...
"Then the raid on the French Island held by the Japanese. That's where Greg got his tank that rests in front of his castle, (Long out of fuel and ammo, but impressive!) Than there was the axis undead submarine, and a counter raid to knock out their transporter hmm we never finished that one, hmmm. Awwhh those were the days."
and
"Still have all those Japanese on the submarine somewhere. I must clean up that loose end someday. They knew about sword fighting and hand-t-hand combat. Not to mention that ninja stuff."
http://odd74.proboards.com/index.cgi?ac ... 988&page=1