Meanwhile Javelins and Throwing Axes (if added) could have a 3 tile range like throwing knives have.
Javelins could even be "equipment" like throwing knives are ....
That way you could equip a unit with a sword, yet they can still throw a javelin or two. (Hastati)
--> You could add it for trainable units, unlockable in the tech tree like any other weapon ... only it would be a "secondary weapon" under special equipment, as opposed to being on the paperdoll as a "primary weapon"
Hell, you could even have a "Lance" as a secondary weapon for a Cavalryman which increases the damage bonus during a Charge (if such an ability were added, as opposed to, or perhaps the same as, the first-turn trait)