Best Slitherine PBEM multiplayer games?

[the_iron_duke]

I have played hundreds of Field of Glory multiplayer games and it's a great, though not flawless, play-by-email (PBEM) game. I've also played Panzer Corps multiplayer but was rather disappointed with it (although I do feel if it was better designed it would have the potential to be as good as Field of Glory multiplayer).

Can anyone recommend any other good Slitherine PBEM multiplayer games?

[IainMcNeil]

Personally I like Battle Academy but then I may be biased