From the game's site:
The Second World War is Pangenre, LLC's Grand-Strategic WII historical simulation game. Assume command of the armies of the Allies or the Axis and either try to conquer the world or preserve it for your own side.
Features

The Second World War is a hex-and-counter wargame. It is designed to fall in between the existing designs Axis & Allies™ and World in Flames™ in complexity and playing time.

* An interactive, phased movement and combat system that seamlessly integrates air, naval, and land operations. Unlike other "push-pull" style wargames, even the non-phasing players will be riveted to the game maps as they prepare to respond to your moves.
* A dirt-simple combat system for fast play. No calculators required!
* A simple economic system that still captures the challenges faced by all sides. You don't have to be an accountant to enjoy The Second World War!
* Simple movement and attack mechanics.
* Three maps of varying scales that share common rules for naval movement and positioning, ground unit operational and strategic movement, and air unit range and missions.
* All the meat of more complicated games with half the calories!