The Lightweight Rucksack was the primary rucksack utilized by United States troops during the Vietnam War and also used in arctic and alpine areas. It replaced the M1952 rucksack (FSN 8465-261-6931) and was in turn replaced by the ALICE in 1973.
The Lightweight Rucksack played a crucial role as the primary pack for U.S. troops during the Vietnam War, particularly in challenging arctic and alpine environments. It eventually gave way to the ALICE in 1973.