Can someone please help

in backed South Korea, Russia and china backed north korea

Explanation:

the us and the un were trying to defend the capitalist south korea, while the ussr and china were trying to spread communism, same thing in vietnam

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.