Is there an alert message for approaching enemy armies?

I am playing EU4 in ironman mode and noticed that I often loose a large number of troops/ships and sometimes entire wars simply because I am focused on a specific war theatre and do not notice that somewhere else a large enemy army is approaching my position.

I often leave supporting troops in an adjacent province ready to move in in case of an enemy attack in order to reduce attrition and to draw the enemy in thinking that my position is weak. With this strategy it is very important to notice when you're about to be assaulted so you can move in in time.

Therefore, the question is whether there is a message pop up one can enable that pauses the game and lets me know that an enemy is approaching.