The song about casey jones, a railroad engineer who gives his life on the job, would most likely fall under the folk song category of work song nonsense song religious song ballad

the fact that could also be added to column b is that during world war ii, specifically between the years 1941 and 1945, japan expanded its territory towards the indonesian territory in what was known later as part of the "pacific war". in that time, japan could conquer the philipines, singapore,   borneo, central java, malang, cebu, sumatra and various other islands of the area, therefore expanding its territory for a brief period of time.

it affected it because the kingdoms (with trade) slowly got richer and richer.