It’s just that they repatriated close to 3000 tons. That’s one long convoy of armored cars, all going to a French warship docked in New York.

Based on some sibling discussion it seems it just never happened. It was multiple shipments, over many years, going over commercial liners. It may have well been armored trucks but they just didn’t all do it at once. It worked well that it didn’t create much of a media uproar.