The ultimate challenge, anyone else do this

[Horatius]

Even if they're excommunicated? Or don't they count as Catholic any more?

What about a crusade called against a Catholic faction?

1. (assuming city in question is not a Crusade target) if they are excommunicated it only means that the nobility has been a bunch of scalewags and scoundrels, but because the cities population is still of the same flock as you are you may not conquer the city. You may however assist an allied faction in taking the city, which maybe helpful to you and makes diplomacy mean something.

2. No good Catholic knows better then the pope, if he calls a Crusade on a Catholic City then Deus Vult (just remember that you are only allowed the city he calls the Crusade against).

Good luck

[Stlaind]

I was considering a game of nothing but agents offensively. Armies van only be used on crusades and for holding ground.

[Horatius]

Good luck at that, although beware of being too successful and assassinating the Pope.

[GuyofJerusalem]

Using agents only? Too simple.

I am currently trying to dominate the game world by using only Princesses. they cavort around the cities dressed in sheer frocks with their baps nearly hanging out and have been the cause of multiple conflicts between other nations through their diplomatic wiles. Soon all of them will turn rebel muhahahaha.

[Empirate]

Are you allowed to freely attack infidels? Within the bounds of chivalric warfare, it goes without saying...
But could you play as, say, France, and launch a naval invasion of the Moorish lands in order to help out you besieged christian brothers in Spain and Portugal?

[General Zhukov]

But could you play as, say, France, and launch a naval invasion of the Moorish lands in order to help out you besieged christian brothers in Spain and Portugal?

Sounds reasonable. Even better if you can get the Man in White to bless the outing.

[Musashi]

Of course, to be a true noble king, you should give the newly taken provinces to your brothers in Spain and Portugal...