This came up in my session tonight. My players all had the cash to buy war horses and outfit them, I ruled that they're readily available in Neverwinter which they were near for their last adventure.
However, there are two bits of text that I'm trying to piece together and figure out how they work. The first is the following from the mounted combat text:
It moves as you direct it, and it has only three action options: Dash, Disengage and Dodge (PHB 198)
Does this mean that you cannot under any circumstances use your mount's attack (such as the Warhorse's Trampling Charge/Hooves attack)?
Reading the next section it really seems to come down to whether or not a Warhorse is considered an intelligent mount or not, answers should address this.