Helping an ally

[Fisherking]

That is weird! I have never had that happen to me.

I will usually only get the deployment screen also. But if I withdraw then there is no war.

I don't know what to make of it.

[DVX BELLORVM]

Maybe if the neutral faction attacks your ally, while you're nearby, you can withdraw without going into war.
In my case it was my ally who attacked (they sallied from besieged town), probably encouraged by my presence.

[Fisherking]

Ah! There is a difference.

I have never had that situation before. If your friends attack a neutral you can withdraw without a war. If they are sallying that could be the difference...Hay that is when they need the help most. I just never have had the situation.

[ReiseReise]

I don't have allies, only victims.