How to guide lords into battling as vassal

I'm a vassal of the Sarranids. We have captured Narra, and it is currently under siege by the Khergs. Our entire army under the command of Emir Nuwas is right next to the city. And, what do you know, no one is moving in to help defend it.

We slightly outnumber them, and the city itself has a garrison of like 300. We have the advantage. We could crush them in a defensive battle, then go on to take Halmar and the surrounding castles as well.

Only problem is, Nuwas isn't doing that. And he won't listen to me. A few lords go to move in and join the battle, but are getting spooked and leave before joining.

Is there any way to get these silly cowards to actually join the battle?

submitted by /u/Banana_Stiffy
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