| Later, in the eleventh century, under kings such as Harald Hardrada, the power-broking jarls were crushed. |
| During this period, the authority of the jarls spread south down the western sea route towards Dublin. |
| These areas were ruled over by local Jarls, originally captains of ships or Hersirs. |
| In the early period there is little clear difference between powerful jarls and the many petty kings who flourished in Denmark and Norway. |
| These details are unclear, but titles and positions like hauldr, thegn, landmand, show mobility between the Karls and the Jarls. |
| He organised a fleet and was able to subdue the rebels, and in doing so brought the independent Jarls under his control, many of the rebels having fled to Iceland. |
