Hearts of Iron III (HOI 3) is a grand-scale strategy game designed by enthusiasts of World War II history, and focused on the military, political, economic and diplomatic interactions worldwide between 1936 - 1948. Every effort at maximizing both realism and playability has been made, and an excellent balance has been found.
It’s time to take command and lead your nation through World War II, the largest conflict in world history. Hearts of Iron III lets you take charge on any front, as any country, and through a variety of scenarios.
From the official HoI 3 advertisements