The people of Scandinavia were at this moment in much the same state of development in which the English had been three centuries before, ere yet they left the shores of Saxony and Schleswig. The Danes and Norwegians were a hardy seafaring race, divided into many small kingdoms, always at war with each other. They were still wild heathens, and practised piracy as the noblest occupation for warriors and freemen. Just as Hengist and Aella had sailed out with their war-bands in search of plunder and land in the fifth century, so the chiefs of the Northmen were now preparing to lead out their followers into the western seas. For two centuries the onslaughts of the Vikings--as these piratical hordes were called--were fated to be the curse of Christendom. The Vikings in their early days were led, not by the greater kings of Denmark and Norway, but by leaders chosen by the pirate bands for their military abilities. Such chiefs were obeyed on the battle-field alone; off it they were treated with small respect by their comrades. There were dozens of these sea-kings on the water, each competing with the others for the largest following that he could get together. [Sidenote: =Their raids grow more permanent.=] The Northmen were at first seeking for nothing more than plunder. Western Christendom offered them a great field, because the Franks, English, and Irish of the ninth century almost all dwelt in open towns, had very few forts and castles, and had built enormous numbers of rich defenceless monasteries and churches. The Dane landed near a wealthy port or abbey, sacked it, and hastily took to sea again, before the countryside had time to muster in arms against him. But after a time the continued successes of their first raids encouraged the Northmen to take the field in much greater numbers, so that fleets of a hundred ships, with eight or ten thousand men aboard them, were found sailing under some noted sea-king. When they grew so strong they took to making raids deeper into the land, boldly facing the force of an English shire or a Frankish county if they were brought to bay. When numbers were equal they generally had the advantage in the fray, for they were all trained warriors, and were fighting for their lives. Against them came only a rustic militia fresh from the plough. If beset by the overwhelming strength of a whole kingdom, they fortified themselves on a headland, an island, or a marsh-girt palisade, and held out till the enemy melted homeward for lack of provisions. [Sidenote: =Sufferings of Northumbria and Mercia.--Reign of Aethelwulf.=]