US Army won its logistics war with a wooden pallet and a forklift

By the early 1940s the US Army was moving supplies across two oceans at a scale no one had planned for, and depots were still handling ammunition, rations, and spare parts the way warehouses always had: one crate, one man, one lift at a time. War Production Board studies found pallets 'seldom employed' by the military as late as 1940, even as commercial industry had been experimenting with them for two decades.

The obvious fix was more labor and faster ships, but manpower itself was the scarce resource — every man on a loading dock was a man not in a rifle company, and wartime drafts were draining the depot workforce even as tonnage climbed. Speeding up ships did nothing if cargo still sat in port for days waiting to be unloaded crate by crate; the constraint was never transport capacity, it was the rate at which a dock or depot could move goods off a pallet-less floor.

Following forklift and pallet trials at the Fort Wayne Quartermaster Depot beginning in 1941, the Quartermaster Corps paired standardized wooden pallets with forklift trucks as the default unit of material handling, scaling the combination across US depots and ports through 1943-1944.

Standardized wooden pallets as the default unit, so one forklift operator could move what took a gang of men, multiplying output per worker instead of requiring more.

A standardized pallet turns arbitrary crates into one unit a forklift can grip, so machine speed replaces manual speed.

One forklift operator could move what previously took a gang of men, multiplying output per worker.

The gain scaled across all depots and ports using the same standard, compounding the efficiency.

It worked despite the draft draining labor because it required fewer workers per ton moved.

When a bottleneck is labor, standardize the unit of work so a machine can multiply each worker's output instead of adding more workers.

Loading and unloading that had taken gangs of men hours per railcar or ship hold could now move in a fraction of the time with far fewer hands; a Navy-designed four-way pallet introduced during the war is credited with roughly doubling material-handling output per worker. Exact depot-wide productivity figures vary by source and period, but historians describe the pallet-forklift pairing as the most significant material-handling development of the war.