That's a good description of when the message appears but I agree that using the word rejoin in a situation when the user joins the game for their first time is misleading. The game used to be translated using Transifex, but when I last tried to make an account there it was quite a pain.

0 A.D. is changing stereotypes!

Okay. Battalions seem like they could be a good idea, as long as they are OPTIONAL. Replacing individual unit training with battalions is not a good idea, but being able to turn a formation into a battalion (or a group of units into a battalion) seems like it would grant a lot of new features, while being unique.

Okay, so what is the Total War vibe, then? Why does Total War use battalions? Why not just have hundreds or thousands of little dudes running around individually? It's because battalions give the opportunity for greater control for the player, including directional attacks, flanking, charging bonuses, fatigue*, morale*, formation bonuses (and weaknesses)... all of the things that make ancient warfare interesting. You can have the benefit of 1000 soldiers vs. 1000 soldiers battles, but with easier player control and combat dynamics. You'd have a couple dozen entities (battalions) to manage in that example instead of 1000. For all those people who desperately want an 'ammo' feature*, battalions make it easier to do.  And it would be less like Total War and more like Battle for Middle Earth 2:   *Fatigue, Morale, Ammo aren't 100% necessary, just easier to implement and manage if desired.     

Merged the posts.