When the US started island hopping in WWII, some Japanese never left the skipped islands because they had no communication. They lived off the land for 40 to 50 years still training every day, waiting for the enemy Americans, not ever knowing the War was.

I wonder how psychologically damaged those guys were. 50 years of hatred, only to find out they have been your closest ally since the last time you saw home.

Crazy. There were reports of those guys, old and all, attacking newcomers on the land thinking they were at war still.