From 1963 to 1966, RAN warships took part in the Indonesian Confrontation. During this period, Australian minesweepers and frigates patrolled Malaysia's coastline to counter Indonesian infiltration parties travelling in small craft. These ships also bombarded Indonesian positions in East Kalimantan near the border with Malaysia on several occasions. The RAN's experiences during this conflict led it to perceive a need for light destroyers and patrol boats tailored to Confrontation-type tasks.