Operation Product was a Dutch military offensive against areas of Java and Sumatra controlled by the Republic of Indonesia during the Indonesian National Revolution. It took place between 21 July and 4 August 1947. Referred to by the Dutch as the first (of two) "Politionele acties". In Indonesia, the military offensive is more commonly known in history books and military records as Agresi Militer Belanda I (Dutch Military Aggression I).