The Guitar

Six strings
tuning stick for each
volume and tone
and armour not to breach

Marching to battle
it screams a roaring sound
turned up to full
enemies fleeing skyward bound

But amazingly, it has a flaw
when electricity gone
it cannot sing anymore
for its power is done

But still it takes many lives
when electric power is present
but when not
it is completely vulnerable to a peasant