Paradox Interactive released Their Finest Hour today, the latest expansion to the World War II grand strategy game Hearts of Iron 3.

The trailer highlights the improvements that Their Finest Hour brings to the game, including customizable invasion plans, unique national elite units, and a new custom game mode. The update also includes "amphibious war technologies" for the Pacific theater as well as a mode that, although it may seem inconceivable, allows players to draft a plan for a land war in Asia.

Hearts of Iron 3: Their Finest Hour is available for download on Steam and other services worldwide. Check out the trailer below to learn the many ways to take over the world.