Fanatical Nations

[Green]

In the User Manual it mentions that;

"In certain games, one or more nations may be specified as being Fanatical. Units of Fanatical nations have two exceptions to the Assault rules. First, Fanatical units do not surrender when assaulted and thus do not suffer the additional losses units that could not retreat normally suffer. Second, Fanatical units do not retreat from Bunker and Pillbox hexes and when they lose as a result of being assaulted, remain in the hex with no additional losses"

Does anyone know where it is "specified" that a nation is Fanatical? The text is accompanied by a picture of a Japanese unit so I assume the Japanese in Japan '45 are Fanatical but I am not sure where to look to verify this. Are there any other games where a Nation has been specified as Fanatical?

Also I see in Japan '45 that the Optional Surrender rule is a default optional rule. As I understand it, this means that Broken Japanese that are successfully assaulted will surrender en masse if they cannot retreat. This does not seem very Fanatical. Am I missing something here?

I do not have the experience with this game to know the impact of this or how fanatical the Japanese feel in an overall sense but I am curious as to how others have found this.