Y/n  rebuilt Osgiliath and made it his capital.  Constructing a grand palace to live  in.

Y/n knows there is more out there yet unfounded.   So he needed to bond middle earth into a kinship. 

He got rid of slavery to start off with. Stating that " no race of middle earth as a whole can be enslaved, and no individual can be hunted to become a slave". Of course it was still possible for slaves to exist.  Most of them are criminals that commit capital crimes like premeditated murder and rape.

Keia was still kept as a slave as well.

Y/n held an annual "blood games".  The blood games pitted warriors of all races against each other. The spectacle was loved by many and became a symbol of middle earth unity.

The consumption of meat from a middle earth race was illegal. 

Orcs became the first to step foot on new lands to colonize.  And  most of them are in the middle earth army.

Of course the middle earth navy belong to the Haradrim.  

But all races were allowed to join the army or navy. 

Years went by and things go smoothly.

Twenty five years later. It was only natural for Y/n to have children.

The first set of twins belonged to Iris.

Y/n Jr and Norsko.    Both of them taking their fighting style from their father

The next set belonged to Vala. 
Beowulf and Damon.  Beowulf used dual axes. Damon fights like his mother with a sword and throwing knives.

Iris had a third son named Magnus.

Magnus has natural magical abilities like his mother. 

Vala had a daughter.

Adria.  Adria was savage in combat.  Fighting with feral tribe wrist blades.  

Iris had another son named Bail. 

Bail focused on helping others and helped improved lives on the island colonies and in the mainland.

Y/n's warchiefs take the rolls of drill Sergeants, training the next generations of warriors to defend Middle Earth and it's interests.