Bro, German instute is in the West, and the West has diffrent view with the East like us. The West is always try to show off what they have when the East,specialy VN always try to Hide the Real power and only show it when necessary.
We had 10 years conflict with Thailand from 1979 to 1988,and we also have dispute with Philipine,Malaysia,Brunei in SCS(east sea) so, we don't wanna scare them now
So, I think you should not read some states abt a regional power from the West, if they state correctly, then they would not be Defeated by VN in VN-Laos-Cambodia