The World of Heptagalum

The world of Heptagalum is a massive Terran Planet (Jupiter size)  The surface of the planet is 90% Land and 10% Water. 
Humans appearred on the world a mere 500 years ago.  How they arrived, not even they know. For all of their exploring since arrival, only 5% of the landmass has been charted. 
Four Kingdoms have sprung up. 
Tayrippen - (Roman Empire)
Kasawary - (Japanese Shoguns)
Ith - (Britons)
Ban Un Ta - (Zulu)

These kingdoms have each spread out from each other, as space is seemingly unlimited.  There are other races present, so the land often has inhabitants who do not like the usurpers taking what they will. 

The Ban Un Ta have taken to the East, in the open grass lands.  Here they have encountered resistance from Dog Creatures and Horse Men.  The constant conflict has caused the Ban Un Ta to be guerilla warfare fighters without equal.  The Ban Un Ta follow grazers and live life almost exlusively on the go.  While they are an empire by name, they have no static cities. 

The Kasawary Have gone south, taken up residence on the shores of a large inland sea (Kasa).  Competition for the seas resources abound (from outside and within...)  Fishing and farming are the main occupations, and everyone is a soldier. .  The Gnomes hold fast to an Island Mountain inside the sea. Fishmen and other monstrosities seemingly come in unlimited supply from the depths.  Three large Castle Cities (Hoj, Sako, and Beyo) fortify the north west corner of Kasa. It is here that the Kasawary stand defiant.     

The Ith have gone North.  There they have found allies in the Elven in the forests from the west, and Dwarves from the Mountains to the north.  They are plagued still by raids and war parties of Orcs and Goblins and all forms of monsters that come down from the mountains, or from the earth below.  Battle Hardened and supplied with Dwarven Arms, they hold fast to the Fortresses and Towns they have formed in the Valleys below Worlds End Mountains. 

The Tayrippen have held tight to where they arrived. A small inland lake, with plenty of farm land and forest marks the seat of The Empire.  The least beset by the monstrous races, they had the time to gather massive armies.    They claim to be the original, the superior race.  While they have open trade with other sentient creatures, non humans are rare within the borders.  Seeing the other humans as inferior, they are quick to war over what they view as rightful resources or land.  And the Tayrippen deem anything found as a rightful resources...