As for Japanese divisions formed in Korea: Hundreds of thousands of Koreans served in the Japanese army; there were Korean divisions; and in fact, much of South Korea's post-liberation officer corps came from the Kwantung army - including the aforementioned Park Chung-hee (dictator for almost two decades and the architect of Korea, inc.) and Baek Seon-yup (the most celebrated modern Korean soldier). But I don't know where these units were formed though.
Addendum: 19th and 20th Divisions were recruited in Korea and stationed there.
Correction: I am wrong. Mea culpa. 19th and 20th divisions were apparently raised in Japan and shipped to Korea to serve. They were not ethnic Korean divisions.
After doing some digging, it seems like that there may never have been ethnic Korean units even at the division level.
Frankly, I've never heard of the "17th army." I know of no ethnic Korean units higher than the division level. There were ethnically Korean divisions based in Korea - often sending elements to the Chinese and Russian theater. But I don't know of ethnically Korean units at the corps level nor army level. Usually, Koreans were dispersed within the Japanese formations and mixed with native Japanese. In this respect, the most prominent association is with Koreans in the Kwantung army. As I have said, most of the relevant post-liberation South Korean officer corps were ex-Kwantung Army - including Park Chung-hee. This is still a flashpoint in south Korean politics today, because South Korea after liberation decided to essentially leave the collaboration issue alone - in contrast to, say, de Gaulle's de-nazification program in France (which likely didn't go far enough anyways and ended up scapegoating a portion of collaborators for theater). This was policy of letting sleeping dogs lie was necessary at the time, because there were too many collaborators to conduct France-like thorough purge. Yet, due to this failure to settle with the past, and there has also been periodic attempt to retrospectively purge the collaborators, whenever a Leftist government comes to power. (I have written about this phenomenon in print.) And these attempts to purge collaborators have occasioned huge cultural wars.
Likewise, I did more digging, and the "17th Korean Army" is in fact a unit that is well known to me, too well-known. I did not recognize it, however, because I was not familiar with that particular title. The "17th Korean Army" is better known as "Chosen Army" - or "Korea Army" - which was a formation stationed in Korea since around the time of the annexation. Obviously, this is a notorious unit in Korea. What I did not know is that its name was changed to the "17th Area Army" in 1945. What I still do not know is whether this unit was also called the "17th Korea Army" - or whether the devs came up with this name to stress its origin.
< Message edited by Alcibiades73 -- 5/17/2021 11:08:54 AM >