[thejeff]

There's no such thing as a stealthy troop without a stealthy commander. As was said above if the summoning commander doesn't have any troops under his command, they will join the provincial garrison. In enemy territory you don't have a provincial garrison so they attack ... and run away because they don't have a commander.

If you sent him out with one cu sidhe under his command, the rest would sneak along with him.