In the board game RISK, the goal is world domination. You achieve that by battling other players within and across continents. The best strategy is to take and hold Australia. Once secured, you can build up your troops while defending the single point of access to keep your opponents at bay, then attack in a methodical style and slowly expand.
This strategy doesn’t always work, but the notion of finding an easily defendable base where you can husband resources and use it as a launching pad to attack others is sound.
