Poland, in it's 21st year of independence regained after 123 years has yet again to face it's aggressors. September 1st 1939 armed forces of Germany and Slovakia, followed by Soviet Union on September 17th attack Poland - all without any war declaration, breaking the non-aggression pacts and international laws.
simple model of an earlier backpack model (1925-27), as still issued to and used by National Defense and freshlymobilised reserve units by 1939
First test; backpack, along with additional gear will be attached to a leather cavalry harness