mlaforce321 t1_j3rbhpf wrote

Are you taking about grenades? Its been used for a while - there are Byzantine examples that date around the 8th century.

They also were widely used in the 15th and 16th century for defense of castles. Then by the 17th century, Grenadier's were standard in almost all European armies.

So unless you do not mean grenades, Im confused as to where you're researching they did not exist in those timeframes.