It was an unbreakable spirit of the KPRA that self-reliance is the only way to overcome difficulties and create a thing out of nothing.

With this spirit, arsenal members at the guerrilla zones increased the production of bombs and made even wooden cannons.

The wooden cannon, manufactured for the first time at an arsenal in Wangqing County, fully displayed its might in the battles defending guerilla zones and attacking barracks of the Japanese imperialist aggression army.

In the latter half of the 1930s, the KPRA units relinquished the guerrilla zones and advanced into vast areas to conduct large-scale guerrilla warfare under a new strategic line set by President Kim Il Sung. At that time, secret bases were built in the vast primeval forest area with Mt Paektu as the centre.

In those secret camps, members of arsenals made bombs with blacksmith's tools like file, whetstone and hammer to supply them to guerrilla units and even repaired rifle cartridge grip and striker and machine guns.

When a sewing needle was broken in the course of producing hundreds of socks to be sent to members of the frontline units of the KPRA, they made the sewing needle with a darner to perform their duty in time.

The KPRA members also manufactured medical appliances like scalpel and forceps by their own efforts to be used for the treatment of wounded persons.