Cambodia is a puppet of Dai Nam and does not have its own name on the map
Cambodia starts up as an uncivilized country and a puppet of Dai Nam. They usually never amount to anything else than being yet another country in Great Britains Sphere of Influence.
Cambodia has cores inside Siam, but it can do little to reclaim them. If one is lucky United Kingdom will release them. In HOD one can try to make a crisis and hope for UK to help Cambodia.
In the 1861 scenario, Cambodia is a puppet of Siam instead of Dai Nam. It does not make Cambodias situation any better though.