NARRATOR: A 'force multiplier' is defined as a factor that enhances or multiplies the effectiveness of a military unit.
NARRATOR: Projectile weapons, body armor, soldier boosts, and supply trains may all be force multipliers.
NARRATOR: Among humans, the concept is as old as our opposable thumbs.
NARRATOR: One of the earliest force multipliers is a long, sturdy stick.
NARRATOR: The soldier need not hit anyone with this stick for its force multiplication to take effect.