During the Early Iron Age (500 B.C.–400 A.D.), people sacrificed mainly by placing the offerings in the water of bogs or lakes. To sacrifice in wetlands is a tradition which goes back to the Neolithic. Several types of offerings were presented to the gods like food, sometimes in pots, beautiful jewellery, like gold neck rings or bracteates, but also farmer’s tools (Lake Käringsjön in the Swedish province of Halland). In some sacrificial bogs/lakes also white stones or hazel rods have been found, indicating that these also had a religious function.
The gods also received offerings of weapons and whole personal equipments of conquered armies. The sacrificed Nydam ship from what is today northern Germany, is supposed to be a ship in which warriors have arrived to the battle field. In addition, animals were sacrificed. At Skedemosse, a sacrificial lake in the Swedish province of Öland, at least 100 horses, 80 cows and 60 sheep and pigs have beed discovered. Finally, also human sacrifice were carried out. Examples of these are the well-preserved corpses found Danish and north German bogs, for ex. the Grauballe man. Probably animals were sacrificed to the fertility gods while weapons were sacrificed to the god of war as an act of gratitude for the victory.
Early Iron Age sacrifices were probably characterized by huge public manifestations in the shape of a big fiest where all participants ate from the meat of the sacrificed animals. The gods received what people could not eat like animal heads and hoofs. Offered weapons were often ritually destroyed at the sacrificed.
There are also signs of sacrifices on dry land during the Early Iron Age, both from Roman authors like Tacitus, but also in some archaeological evidence, for example from Halland, a west Swedish province. Sacrifices on dry land became common in the Late Iron Age.