I seem to recall that there were 6 signers of the Tripartite Pact (Germany, Japan, Italy, Hungary, Romania and Bulgaria) along with some other axis aligned nations such as Finland, so don't forget all those. Most only know the big 3. Anyway, great idea.
For those of you interested in WWII, see the picture in the link provided. Notice the size of the ship in the lower left. Obviously, my uncle never made it home from that voyage. Afterward, they decide maybe they shouldn't carry troops and ammunition on the same ship. You would think they would have figured that out before.
http://en.wikipedia.org/wiki/File:S...Apr_1944.jpg