Newb Strat Q. - Dealing with incursions ?

[ceremony]

With the solo game it is simply: crank up province defense adjacent to the large enemy force, but leave it with a low province defense outlet. The AI will almost invariably attack the province with the low defense. You can channel the AI like this through several provinces while you gather your army. The Last step is to have your army meet the enemy army in one of these low-defense provinces you have led it to. Assuming your army is capable of dealing with the enemy, problem is solved. It's almost like leaving a trail of cheese or breadcrumbs.

Multiplay is a whole different story.