Beginning in the middle of the 2nd century, the Wielbark culture shifted southeast towards the Black Sea. During this time the Wielbark culture is believed to have ejected and partially absorbed peoples of the Przeworsk culture. This was part of a wider southward movement of eastern Germanic tribes, which was probably caused by massive population growth. As a result, other tribes were pushed towards the Roman Empire, contributing to the beginning of the Marcomannic Wars. By 200 AD, Wielbark Goths were probably being recruited into the Roman army.