Frankish settlers were established in the areas north and east of the Romans and helped with the Roman defense by providing intelligence and a buffer state .
Roman soldiers defended the Rhine and had major armies 100 miles ( 160 km ) south and west of the Rhine .
Frankish settlers were established in the areas north and east of the Roman and helped with the Roman defense by providing intelligence and a buffer state .
Roman soldiers defended the Rhine and had major armies 100 miles ( 160 km ) south and west of the Rhine .