Other objects had been placed in a local museum but disappeared, possibly but not necessarily during World War I. This is a real, long-term problem with important archaeological finds; local people often want them to be placed in a local museum rather than being shipped off to London or Paris, but small, local museums get robbed all the time, so valuable artifacts placed in them have a bad habit of disappearing.
Everyone seems to agree that the man buried in this grave was a barbarian soldier in Roman service. Vermand was at that time the site of a Roman headquarters, part of the frontier defenses of Gaul. The weapons are of Roman type, and the grave was within a late Roman cemetery. But in a 1986 publication, a Met curator named Deborah Schorsch argued that some elements of the decoration are unusual and suggest a more exotic origin. In particular she focused on a small fibula in the shape of a cicada, one of the artifacts that was lost from the local museum. These appeared on the Ukrainian steppe around 300 AD and were widely used in eastern Europe over the next 150 years or so. In the early period they are quite rare west of Hungary, and when they do show up in the Empire that is generally taken to be a sign of Huns, Goths or Alans breaking in. Incidentally the first people to give much attention to cicadas in their art were the Chinese, who associated them with resurrection, so this may be one of the ideas that spread across Asia from one end to the other. (Like the Cindarella story or the Three Hares motif.)sacrificed horses. According to Schorsch, the decoration on this spear shaft ornament also looks more like objects from eastern Europe than anything found within the empire; notice the dragons.
(The six-pointed star, incidentally, was widely used across the Empire, not just by Jews.)