In MTW you could see this alot but then in MTW a spy in a enemy province could tell you was going to attack you in 3 turns and you could prepare, the AI had no such adavantage so some was built in I believe...

MTW worked in phases...

First phase was planning movement and construction where yo maved things around and planned what you built, then you hit End Turn and it performed the same logic for each AI faction in turn..

Secondphase was carrying out movement where it would show the other factions pieces moving where they planned, note that movement could be blocked by the movement of opposing armies if they where bigger...

Third phase was consquences of the moves, if you moved a piece into someone elses province then the fight was there, if they moved into yours there was a fight and if you moved into each others the fight occurs in the smaller army's province...

The first section after you pressed the Enf Turn was where the AI had an opportunity to "cheat"...

But I think RTW is a bit different... The turns function differently with battles occurs when forced.. Basically there are no phases just turns, move and fight a battle during your turn (or even several battles if you have enough movement points) and if the enemy attacks you in it's turn you fight again... and after a couple trips around the turns wheel it is easy to forget who went before who..