A number of weapon deposits, intentional burial of weapons stashes either for sacrifice or burial, are known from the Roman Iron Age of Scandinavia. It represents one period of bog deposits in Scandinavia.
The archaeology of a former lake at the Jutland site of Illerup Ådal is the best evidence for what are taken to be the sacrifice and destruction of the weapons and equipment captured from enemy soldiers (at Illerup, soldiers rather than tribesmen because a certain uniformity of equipment suggests professional organisation). The anoxic conditions of the mud or peat at the bottom of the lakes or bogs preserved many of such sacrificed artifacts in good, or excellent condition.
Among the offerings at Illerup are also items belonging to the personal equipment of members of the defeated army. Combs made from reindeer and moose bones together with the finds of Roman coins could indicate that the army originated from northern Scandinavia and was on its way home from plunder or auxiliary service in the Roman Empire when it met its fate at Illerup.
Bogs are known to preserve bog bodies and bog butter but no human bodies are known to accompany the weapon sacrifices. The main Illerup deposition, besides weapons, includes gold, silver, spear shafts, shield boards, ropes, cords, leather, textiles tools, wooden vessels, spoons, beads, four horses and a cow.Dendrochronology of the shield boards shows that the deposition was soon after 205 AD, yet the last coin was minted in 187/8 AD. The shield bosses are taken, in the book, to represent 3 levels of hierarchy in the small army. The ordinary soldiers were represented by 350 iron bosses. The next level up had 30 bronze bosses and 6 bronze or iron bosses with gilded pressed foil. Above these, there were 5-6 silver shield bosses. Some Illerup objects have runes similar to those on the Vimose inscriptions.
A good number of weapons sacrifices are accompanied by boats, such as the Nydam Boat and the Hjortspring boat. Most Danish weapons sacrifices date from 200 – 500 AD. but earlier ones are known back to Hjortspring, around 350 BC, where more than 50 shields, 11 single-edged swords and 169 spearheads accompanied the boat.