The first Fusiliers were gnomish, dwarvish and halfling heroes during the Great Wars when the Giants of Straul devastated the world. Armed with little more than slings, throwing axes and boomerangs, they fought enemies five times their size and prevailed. This tradition continues in the Fusilier Prestige Class. They are adept at abusing their small size to confound larger opponents, are highly skilled with slings and throwing weapons.
This is a Prestige Class for Archers, and they retain the original class's Prime Requisite, in this case, dexterity. Fusiliers cannot become Assassins, like Archers can.