Bunker Mu-2 of the front line

This one has two machine gun casemates of flanked fire. February 21, 1940 a little group of Finnish artillery spotters under command of fenrick Jorma Virtanen was blocked here for more than 10 hours. They fought by machine guns and hand grenades and called friendly fire to their bunker. They has been saved by Finnish infantry, after that front line bunkers of this sector were abandoned by their defenders.