Starkwood is a NGC (Non Governemental Contractor) like Blackwater, or Red Cell Int. that has a large arsenal and areas of operation around the world. A project such as Archenland would most likely be initialy backed by a NGC such as Starkwood. Starkwood has several bases on the Australian continent, from which they can launch ships to aid, warn, or provide a show of force, and in dire need, destroy. Its closeness to Terebithia means that the sphere of influence is heavy on Terebithia. Many enemies would not dare cross a single Starkwood capital ship, much less attack an entity near a Starkwood base. The images of the Terebithian Strait is quite clear:
These are the bases that Starkwood can use in an emergency to provide aid to one or more of the countries.