Yes, yes - advising you to use common sense is utterly unhelpful.
It's supposed to be a battle with the guards + player characters versus the orcs, not the player character versus the orcs while the guards stand idle on the other side of the screen.
Then dont make it into a private fight with a boat full of Orcs by running into it - intentionally. And then complaining that guards didnt run to help you.
I wouldnt either. (and i shouldnt do this kind of help, obviously)
I would say: "hey guise, look at that special case running into the Orc boat, lets watch the fun."