Military mission event

[Liberator]

Nevermind, I got something wrong.

French ones only happen for Shogunate supporters and British only for Imperial ones. Both can get American missions.

Thats quite interesting. I am not to far in the game, and I have an english mission, and switched sides to be on the shogunate side now.

Can I build several missions? is there a benefit of additional missions besides the recruiting of special units? From the economical point of view, it seems to me as one mission is enough to trade with the gaijins.
Besides, I got the impression that the missions don't differ that much. Different ironclad units seems to be most eyecatching difference in the stats.