1v1 isn't good to check for morale, it is good for unit to unit tests.

If you want a more proper test you should test 4v4 or similar. There is a need for changes that can happen in a battle. Trust me if you don't try to overpower one side (such as halting and using up all the javelins) then you will see some good effects.

You shouldn't have used all the javelins as if you had been the other unit you wouldn't have let you opponent do that. One volley and that's it.