In BOTF, when there is a battle you receive a question if you want to fight it yourself or automate it (or open hailing frequences). If you choose to fight it you get the screen with both the fleets. Or more than 2 actualy. If one of the sides has only cloaked ships, and they are cloaked, then they can shoot first without risk of getting hit before they do so. Let's say that is not the case. Every admiral (ie you, and the AI) gives orders to his fleet, either by choosing a type of ships (like Strike cruisers) or individual ships, and then choosing target and way to attack or move or retreat or open hailing frequencies or etc. If for whatever reason you don't feel like giving orders (don't know why since it can be done so quickly!) you can just either click turn, or click on auto in both cases the AI will handle the remaining or all of your forces that have no orders from you. Anyhow, when you are ready you click end turn. The battle starts, for about 8-15 sec or so the ships fight/move/etc according to your orders in real time. Then they stop, and you can give further orders. It goes on till the end of the battle, which rarely lasts more than 5 or so turns. It is like Combat Mission (though created first of course..I think) but it doesn't suck as CM does. (personal opinion)
The way that Reach For The Stars works (BTW I strongly suggest to try the demo for it which can be easily found) is this.
When you have a battle you can see both fleets at a distance. Zoom level depending on their distance. You get options change the formation of the whole fleet. Echelon, Line etc. You can also give orders to what distance to the enemy they should try to be, close, medium, far. Or you can give orders to withdraw (try that is) or withdraw with leaving your destroyers covering the rest of the fleet. That is it. The thing is that though it is very simple the way orders are given (each turn can be from 2 to 4 clicks away including the end turn button and the orders to your fleet) the battles are not paper sciscors (sp?) rock but quite complex. It is fun and quick and a possible source of ideas. I strongly suggest to try the demo if you are interested, or even buy a copy for 10 GBP (download) from the Matrixgames site who apparently have bought the rights of the game and also updated it with a new patch. Oooor, do that and buy me a copy because I can't find mine anywhere.

OK, the last is a bit too much, but I strongly suggest trying the demo .
I think a Spartan-like game could use a similar system to have quick battles with depth and manage to have the player focus on the grand strategy more.
Now, I shut up.
Plato was right.
Slitherine for 4X in space!