I'll agree to starting Friday then as well.
As for "I thought moving an army into another players territory will always start a battle if there is a defending force present?" yes this is true.
As way of further explanation: CTing vs stealthing in. To start a battle in a distant province on the turn a nap ends you could either spend the remaining turns of the nap to slowly move a stealth army to the province and unstealth once the nap ends, or on the last turn you can use the Cloud Trapeze (
http://dom3.servegame.com/wiki/Cloud_Trapeze) spell to "teleport" there. One way contravenes the nap, the other way doesn't.