This is what makes a ‘Fister’ so deadly

Nestled inside infantry units moving against the enemy is often a single artilleryman who is arguably one of the most lethal fighters on the battlefield — the forward observer.

These soldiers, usually assigned to a Forward Support Team, or "FiST," are known as "FiSTers" and are the eyes and ears for naval guns, air strikes and ground artillery across the world.

Read more about these badass warriors here.