If he is serious about invading I will send 200,000 troops with 300 aircraft and half my navy to defend. But I dont think he realized it was my territory since he thought 20,000 soldiers would be able to conquer them. They are Fiji, an independent country, maybe you are thinking about New Caledonia which belongs to France, that Australia somehow possesses. I got the islands by sending one soldier there, he won since they had no army, ask Archi.