I have attached a map that may explain my google experience.
View attachment 244957
1. I suspect this is the main entrance but never got to that location.
2. This was the road I was looking for from Google Maps and in this area is the bus parking area
3. The main entrance to the War Memorial of Korea
4. There is another road next to the War Memorial back entrance that as it turns out Google thinks is the correct entrance to use and suspect got confused. I suspect this is a back entrance to the base and not normally used.
5. The direction of the subway station I arrived at and returned to.
I am ex military so understand what happens when one gets into a potential altercation with security be it military or contracted guards and why I left without fuss. When I did find the correct entrance, the bus area, I was fortunate that a bus driver that suspected I was looking for the main entrance and pointed me in the right direction.