Below is the current map of the Upperworld.

You can see that the demon forces have occopied almost 95% of the lands.

The invasion started from the east gate of the Underworld 18 years ago.

After conquering the countries around the east, the demons attacked from the south; from the south gate of the Underworld...

Then they opened up the West gate of the Underworld and conquered 80% of the Upperworld in a span of 15 years!

Then they created a Capital city named as 'Upper Heleachoria' in the Upperworld to control and co-ordinate their attacks and resources...

Upper heleachoria was named after the capital city of Underworld known as Heleachoria.

Upper heleachoria became the catalyst for the demon invasion of the Upperworld due to the fact that this location was chosen by the prime tactician of the demon king. It was located at the perfect place, many forces could be deployed from here, it was located close to the south gate of Underworld, this it was constantly supplied with fresh troops and equipments that fuelled the conquest of the Upperworld.

The resources and captives gathered here were sent to the Underworld.

The North gate of the Upperworld was opened up by the Demon king four years ago... for the final conquest of the Upperworld.

In a span of four years they reached near the so called edge of the Upperworld.

They conquered many countries big and small altogether...

Soon very few countries were left, the remaining countries of the Upperworld allied themselves together against the demon forces but still suffered heavy losses. This was not the first time when the countries have allied together against the Demons.

Many countries earlier allied themselves with each other against the demon forces but still were crushed.

The instigator of the Last alliance of the Upperworld, Eisenhiem Kingdom and 'Allied armed forces', were still facing defeat. Most of the parts of the Eisenhiem Kingdom were annexed by the demon forces.