Within the Equestrian Military physically large and powerful earth ponies where selected to become what are called Bellators. Bellators where trained to use heavy unconventional specialized weapons. The Green Tail Grenadier Guards, where a type of Bellator unit trained in the use of iron ball grenades, most recognised by their tall fur caps and green tails. They were extremely effective in older Equestrian Formation warfare, which would form three fighting units in a line, a right wing, center, and left wing. With light cavalry on the sides of each wing. And a reserve unit behind the center. Green Tail Grenadiers would line the reserve unit throwing iron grenades over the battle line into enemy ranks. Then once they deplete their grenade pouches, they move in to support any units which need them.
Being larger and superior fighters, Green Tail Grenadiers would often lead assaults in the field of battle. They would also lead the storming of fortification breaches in siege warfare.