It's natural to think that Harry (described as being 'on the front line') was not quite on the front line....that there were people watching out for him and he would have been plucked out of the way, if real trouble had presented itself. However, we don't know this for sure....and all those that served with him, were given medals, so we have to take it on face value!
Myself, i am not a royalist and think that Harry was just in a rather 'cosseted' front line position, but there you go!