How do you set a different default attack stance from a military production building?

Ok, prob a simple question. And I believe I read something about this in the past, but can't find it.

How do you set a military production building to create units that have a default attack stance other than aggressive?

My micro sucks, because I suck. But it is annoying to start pumping out knights and set the gather point in his wood line only to check back a second later and they are under the TC being murdered.

If they would be set to defensive or if archers would be set to stand ground upon leaving the production building. They may live longer. And if they live longer, I in return, may also live longer. Which I believe is the point of the game.

Any help is appreciated.