question about the new team based game mode

Hey guys, i was wandering about the new team mode and how you (as far as i know) share the same color. Isn't that confusing? I mean how do you tell your units apart from everyone on your team? How do you tell your commanders apart? Can you control your teammates units, e.g. your teammate makes a navy, then you hijack it.

It's one army that is shared between multiple players. There is no "your" units and "their" units.
If you want to not share an army, you should do a game with alliance* and not a game withe shared army.

*That game mode is not available yet.