Just came across this by accident, but shows some interesting insight into Latvian SF. Ignore the guy speaking over, if necessary.
I have an aversion to videos where the narrator takes 30 minutes, on a 10 minute subject or process. In this case, I won’t expend a lot of time listening to this guy chiming in.
Latvian riflemen were often used as elite or shock troops in WW1 and the Russian Revolution. Much of their land being forested, it is not surprising that they are hearty.