The Navy's need for long range land-based aircraft for patrols against enemy shipping and submarines during World War II led to procurement of Army B-24 Liberators, designated PB4Y-1s. By war's end, the Navy acquired its own modified version, the PB4Y-2 Privateer, for use in reconnaissance across the Pacific. Privateers remained in service throughout the Korean War and were also employed by the Navy's Hurricane Hunters for a time.