Defensive "Catch"?

[vanedor]

I fear it might be too powerful.

Something I would like, however, is that the armies do not move at once. For example, if I attack a province with an army with a minimum speed of 2, I would attack before an army with a speed of 1 has the time to move out. This would make armies consisting of cavalry/flyer great raiders and make the light/medium infantry more useful and powerful, and give huge fat armies a harder time behind the enemy lines.