The acclaimed Australian writer John Marsden wrote a series of war novels which came to be known as the "Tomorrow" series. The first of those was entitled, "Tomorrow When the War Began" and has now been adapted into a movie:
The story deals with a group of Australian youths who are forced to grow up when they are confronted with a foreign military invasion of their country. In the novel, the identity of the foreign invader is not explicitly mentioned. In the movie however, the occupying soldiers are clearly shown as East Asians with mongoloid features.