Historian M. C. Ricklefs said the transfer of European military technology to the Javanese was "virtually immediate", with the Javanese manufacturing gunpowder and firearms by 1620 at the latest.
Sejarawan M. C. Ricklefs mengatakan pengalihan teknologi militer Eropa kepada orang Jawa "cukup mendesak", dengan bubuk mesiu dan senjata buatan Jawa setidaknya pada 1620.