The Bloodline of Britain completely vanished in 2011 when all the royals died mysteriously of an illness. The crown was passed on to a noble " King Rithan" a firm man who believed strongly in the "survival of the fittest" and that mankind had been left behind by evolution because of the dilution of the species. All children born during his reign had these ideas forced upon them. Those who were terminally ill or disabled were immediately killed and those who were seen as unworthy i.e physically weak were also cast aside. A new, more "perfect" Britain was raised and therefore returned to the formerly glorious name of Britania. The king himself believed these things so much he bore sixteen wives. Each baring one child. He then declared the child that proved themselves would be the one the succeed him. Eight of his children currently reside in his army each commanding their own elite force.
Those who join the empire as known as "honorary Britanian's" and are still treated as lesser beings however they get basic rights unlike those who refuse to pledge allegiance who are left to struggle in poverty.