main reason for japan to occupy indonesia was to secure mineral resources,particularly petroleum. indonesia was producing about 10 million kl of petroleum per year,and was very attractive for japan to continue the war. japanese army paid attention to indonesia human resources. they applied military training for indonesian youth, and in 1943,established the first indonesian fighting force as voluntary troop to protect their homeland. main reason for japanese army was to supplement the shortage of fighting force due to expansion of the front and to prepare for the counterattack by allied forces. The japanese army also conscripted indonesian work force at many parts of indonesian to build railroad, airport, and work at coal mines, etc. many indonesians did not return after conscription, and the mood against the japanese military rule was getting high. Under such circumstances, japanese army directed attention to the national heroes of independence movement, soekarno and hatta. japanese army released them who were jailed by colonial dutch government, and obtained their cooperation under agreement that indonesian shall be independent in future. this is a propaganda movie made by japan. sorkarno is marching in town to call for cooperation of indonesian workers to support japanese army. "each drop of you sweat will be poison to the enemy!" "We shall destroy the enemy!" "Destroy british,American, Dutch