 A number of efforts over time were invented to prevent the enemy from responding with the arrows fired against them.The Pyeonjeon is one method, as opposing forces who lacked an overdraw device/tong-ah would be unable to use the short arrows on the field (though experienced opposition archers who figured out how the Pyeonjeon was fired or who were already equipped with an overdraw device similar to the tong-ah may have been able to re-use such arrows).Used by the Koreans, this weapon was considered a national secret during the Japanese invasions of Korea (1592-1598).