The Tapani Defense Force functioned as one of three mobile Imperial naval groups responsible for security within the Tapani sector throughout the duration of the Galactic Civil War. Alongside it were the Ground Pounders and Swift Wing fleets.
The primary function of the Tapani Defense Force involved patrolling the Shapani Bypass, and it distinguished itself as the largest of the three fleets, boasting the highest standards of discipline and training among its crew. On occasion, the fleet undertook extended voyages throughout the sector, demonstrating Imperial power to the inhabitants.