I took it to be that the kingdom he was fighting was a Dwarf kingdom. No where in his post did he tell the race of the enemy kingdom. There are two reason I think the kingdom that his kingdom is warring is dwarf: 1 the gold dragon hurts dwarfs most of all, 2 they lost 40% of their land. Dwarfs have fog that can make an attack much longer and if the other time is much faster they can attack twice before the army gets back home thus how the enemy kingdom was able to take 40% land.
From my understanding this war has been going on for some time.