I've been trying to work out the whole "Combat while mounted" thing in 5e. My biggest question is this, if I am up against a monster (or a few), does the DM roll to see if the monster will attack me or my mount? For instance, if I am in combat with 3 orcs, do all three orcs just choose to attack me or is there a 50/50 chance that one or more of orcs attack my mount instead?
In the past few combats my DM has targeting my ranger and saying that he doesn't care about my mount. I'm a Halfling ranger mounted on my Wolf companion and I am attacking with both my mount and myself. It just seems that there would be a chance that the monsters would attack my wolf sometimes instead.