With the exception of Ace Combat: Joint Assault Ace Combat: Assault Horizon, Infinity and Ace Combat (all together in the real world), the franchise takes place in a world similar to Earth nicknamed Strangereal with geography and country different. The planet is also in the same solar system as the Earth in real life, with the same sun, moon, and apparently constellations; a particular constellation Crux, plays a major role in the plot of Ace Combat X: Skies of Deception. The only geographical similarities between Strangereal and real life on Earth is that covers Antarctica South Pole of the planet, a health archipelago of New Zealand is close to him, and there is a harp shaped country in the North side seems to be a part of Northern Canada. Strangereal also contains scattered and / or deformed the Earth emerged as a distorted Mediterranean near the equator, and Svalbard and Britain-as in the northern islands. Reading longitude for the planet is based on a 360 system that is oriented west.
There are four broad masses Strangereal where most of the Ace Combat games are fixed and are separated by several major oceans and large seas, called Osea, Anea, Verusea and USEA. Air Combat (after retconning), Ace Combat 2 Ace Combat 3: Electrosphere and Ace Combat 04: Shattered Skies are all set USEA. Ace Combat 6: Fires of Liberation takes place in Anea, just north of Verusea. Ace Combat 5: The Unsung War reveals the Strangereal map for the first time, with its principal combatants, Osean Federation and the Union of Republics Yuktobanian, facing each other across the Ceres Ocean. The Atlantic Ocean is the largest ocean, affecting Osea, USEA and Verusa. The Cascade Ocean is the second largest ocean, affecting Osea, Anea and Verusa. The Arctic Ocean covers the North Pole, and the Pacific Ocean is below the Ceres Ocean.