From Peng Dehuai's Autobiography he mentions on the 19th of October 1950 during the first campaign of the Korean War he reached the power station at "Raekosao," does anyone know what city he is referring to? Im unable to find anything by the name "Raeksoao" so if anyone has a better understanding of korean geography or language do you happen to know where this (city?) is or what a more accurate pinyin romanization would be to find out more about this location?
It may not be a city but maybe a geographic feature. Like mountains, hills, valleys, even the curve of a river, etc have names sometimes and that may have been one of them. At least I'm going off my understanding of naming as a westerner as those seem to be rules found all over the globe.
Considerations:
The clue is I suppose it's something that can be reached from the Yalu river left at late evening time by morning via whatever conveyance they were using (walking, trucks, etc). I would see if you could find a copy of this in Chinese and see what the original language characters say there (deepl can help translating).